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Next accounts due

2026-12-31 (in 7mo)

Last filed for 2025-04-06

Confirmation statement due

2026-11-03 (in 6mo)

Last made up 2025-10-20

Watchouts

1 item

Watchouts

Facts from the Companies House register and the latest accounts — not a rating

Name history

Renamed 3 times since incorporation

  1. RSK ENVIRONMENT LIMITED 2007-01-22 → present
  2. RSK ENSR ENVIRONMENT LIMITED 2003-04-03 → 2007-01-22
  3. R.S.K. ENVIRONMENT LIMITED 1989-05-18 → 2003-04-03
  4. TAMAS LIMITED 1989-01-11 → 1989-05-18

Accounts

Audit & accounting basis

Accounting basis
FRS 102
Reporting scope
Standalone (parent only)
Auditor
BDO LLP
Audit opinion
Unqualified (clean)
Going concern
Affirmed

“The Directors believe that the Group will continue to manage its business risks successfully despite uncertain economic conditions in some business sectors and countries. After making enquiries, the Directors have a reasonable expectation that the Company and the Group have adequate resources to continue to operate for the foreseeable future, being a period of at least twelve months after the date on which the report and financial statements are signed. Accordingly, they have continued to adopt a going concern basis in the preparation of the annual report and financial statements.”

Group structure

  1. RSK ENVIRONMENT LIMITED · parent
    1. 1st Inrail Limited 100% · United Kingdom · Rail Services
    2. 3BM Limited 100% · United Kingdom · Architectural Activities
    3. 4AP-Geoteknik A/S 100% · Denmark · Geotechnical Services
    4. A.B.M. Serveis D'enginyeria I Consulting, S.L. 100% · Spain · Specialised Technical Engineering Solutions
    5. AA Milieu-en Adviesbureau BV (Adverbo)* 51% · Netherlands · Environmental Consultancy
    6. Absolute Solar and Wind Ltd 100% · United Kingdom · Engineering and Construction Services
    7. Acies Civil and Structural Limited 100% · United Kingdom · Structural Engineering
    8. ADAS Silverdale Limited* 92% · United Kingdom · Environmental Consultancy
    9. ADEV Environnement SAS* 100% · France · Environmental Consultancy
    10. Advantage RSK Limited 60% · United Kingdom · Quantity Surveyors
    11. Advantage RSK Ltd* 60% · Israel · Quantity Surveyors
    12. Affordable Skip Hire (Bristol) Limited* 100% · United Kingdom · Waste Management Services
    13. Althoff & Lang GmbH 100% · Germany · Environmental Consultancy
    14. Amphos 21 Consulting Chile LTDA* 100% · Chile · Environmental Consultancy
    15. Amphos 21 Consulting Peru S.A.C* 100% · Peru · Environmental Consultancy
    16. Amphos 21 Consulting S.L. 100% · Spain · Environmental Consultancy
    17. Amphos 21 Group S.L.* 100% · Spain · Environmental Consultancy
    18. Apollo Strategic Communications Limited 100% · United Kingdom · Public Relations and Communications Activities
    19. ARA Architecture Limited 100% · United Kingdom · Architectural Services
    20. Argrennan Estate Limited 100% · United Kingdom · Property Management
    21. Argus Environmental Limited 100% · United Kingdom · Non-Trading Company
    22. Atlantic (Aust) Pty Ltd* 100% · Australia · Water Management
    23. ATP Architects + Surveyors Limited 100% · United Kingdom · Architectural Services
    24. ATV Contract Services Limited (formerly known as Talisman Limited) 100% · United Kingdom · Plant Hire
    25. Aurora Health Physics Services Limited 100% · United Kingdom · Radiation Surveying and Consultancy
    26. Axis Well Technology Group Limited 100% · United Kingdom · Well & Reservoir Consultancy
    27. Axis Well Technology International Limited* 100% · United Kingdom · Well & Reservoir Consultancy
    28. Axis Well Technology Limited* 100% · United Kingdom · Well & Reservoir Consultancy
    29. Axis Well Technology Management Limited* 100% · United Kingdom · Well & Reservoir Consultancy
    30. Axis Well Technology Middle East LLC* 49% · UAE · Well & Reservoir Consultancy
    31. Azerbaijan Environment and Technology Centre Limited 100% · United Kingdom · Environmental Consulting
    32. Azerbaijan Environmental Services MMC* 49% · Azerbaijan · Non-Trading Company
    33. Bateman Skips Ltd 100% · United Kingdom · Waste Management Services
    34. BGT Hungaria KFT* 100% · Hungary · Environmental Consulting
    35. RSK Benelux 90% · Belgium · Environmental Consulting & Remediation
    36. Binnie & Partners Limited 100% · United Kingdom · Holding Company
    37. Binnies Australia Pty Ltd* 100% · Australia · Engineering Services
    38. Binnies Hong Kong Limited* 100% · Hong Kong · Engineering and Construction Services
    39. Binnies Philippines Corporation* 100% · Philippines · Consultancy
    40. Binnies Shenzhen Limited* 100% · China · Engineering Services
    41. Binnies Singapore Pte Ltd* 100% · Singapore · Engineering and Construction Services
    42. Binnies UK Limited* 100% · United Kingdom · Engineering and Construction Services
    43. BMG Research Holdings Limited 100% · United Kingdom · Holding Company
    44. BMG Research Ltd* 100% · United Kingdom · Research
    45. Brown & May Marine France SAS* 90% · France · Marine Surveying
    46. Brown & May Marine Limited 100% · United Kingdom · Marine Environmental Consultancy
    47. Brown & May Marine Spain, S.L.* 100% · Spain · Marine Surveying
    48. BTS Group Limited 100% · United Kingdom · Vegetation Management
    49. Building Sciences Limited 100% · United Kingdom · Drilling and Site Investigations
    50. C.J. Associates Geotechnical Limited 100% · United Kingdom · Engineering Services
    51. C.R. Civil Engineering Limited 100% · United Kingdom · Technology Services
    52. Calibrate Group Limited 100% · United Kingdom · Holding Company
    53. Calibrate Inc Ltd* 100% · United Kingdom · Environmental Consultancy
    54. Calibrate Leasing Limited* 100% · United Kingdom · Environmental Consultancy
    55. Calibrate Maintenance Ltd* 100% · United Kingdom · Environmental Consultancy
    56. CAN Geotechnical Limited* 100% · United Kingdom · Geotechnical Services
    57. CAN Limited* 100% · United Kingdom · Non-Trading Company
    58. CAN London Limited* 100% · United Kingdom · Non-Trading Company
    59. CAN Renewables Limited* 100% · United Kingdom · Renewables Maintenance
    60. CAN Structures Limited* 100% · United Kingdom · Construction Services
    61. CAN UK Holdings Limited 100% · United Kingdom · Holding Company
    62. Carbon Zero Consulting Limited 100% · United Kingdom · Environmental Consultancy
    63. CBEC Eco Engineering UK Limited* 51% · United Kingdom · Eco-Engineering
    64. Ceetech Limited 100% · United Kingdom · Mechanical Engineering Firm
    65. Centara Limited 100% · United Kingdom · Environmental Consultancy
    66. Central Alliance (Holdings) Limited 100% · United Kingdom · Holding Company
    67. Central Alliance Pre Construction Ltd* 100% · United Kingdom · Site Investigation Services
    68. Cognica Limited* 100% · United Kingdom · Construction Services
    69. Consents Solutions Ltd 100% · United Kingdom · Construction Services
    70. Copeland Wedge Associates Ltd 100% · United Kingdom · Engineering Consultancy
    71. Copper Consultancy Limited 84.62% · United Kingdom · Strategic Communications
    72. CRCE Plant Limited 100% · United Kingdom · Plant Hire
    73. W. Crowder & Sons Limited 100% · United Kingdom · Agricultural & Horticultural Consultancy
    74. CS2 Limited 100% · United Kingdom · Building and Quantity Surveyors
    75. Cumbria Access Services Limited* 100% · United Kingdom · Non-Trading Company
    76. CX Energy Ltd* 100% · United Kingdom · Construction Consultancy
    77. CX Group Holdings Limited 100% · United Kingdom · Holding Company
    78. CX Utilities Limited* 100% · United Kingdom · Utilities Service Provider
    79. Deans Civil Engineering Limited* 75% · United Kingdom · Civil Engineering
    80. Deans Developments (Kilbarchan) Ltd* 75% · United Kingdom · Civil Engineering
    81. Deans Holdco Limited 75% · United Kingdom · Civil Engineering
    82. Decision Support Tools Limited* 100% · United Kingdom · Asset Management
    83. Dermot Casey Hire & Sales Limited* 100% · Ireland · Arboriculture Services
    84. Dermot Casey Tree Care Limited 100% · Ireland · Arboriculture Services
    85. Dionysus Group PTY Limited (t/a Western Project Services)* 100% · Australia · Non-Trading Company
    86. Dr. Tillmanns & Partner GmbH* 100% · Germany · Environmental Consultancy
    87. Drilling Supplies UK Limited 100% · United Kingdom · Drilling Services
    88. DWD Property and Planning Limited 100% · United Kingdom · Property & Planning Consultancy
    89. Dynamic Sampling UK Limited 100% · United Kingdom · Drilling and Site Investigations
    90. EB7 Limited 100% · United Kingdom · Architectural Activities
    91. EB7 Party Wall Limited* 100% · United Kingdom · Architectural Activities
    92. ECD Architects Ltd* 100% · United Kingdom · Architectural Activities
    93. Ecologia Environmental Solutions Holdings Limited 100% · United Kingdom · Holding Company
    94. Ecologia Environmental Solutions Limited* 100% · United Kingdom · Environmental Consultancy
    95. Ecologia Environmental Solutions SRL* 55% · Italy · Site Investigation Services
    96. Economic Research Services Limited 100% · United Kingdom · Economic Development Consultancy
    97. Edge Environment Pty Ltd* 63% · Australia · Environmental Consultancy
    98. Edge Environment Ltd* 100% · New Zealand · Environmental Consultancy
    99. Edge Latam SpA* 50% · Chile · Environmental Consultancy
    100. EDP Consultants Hong Kong Limited* 100% · Hong Kong · Environmental Services
    101. EDP Consultants Ltd 100% · United Kingdom · Environmental Services
    102. EDP Consultants Pty Ltd* 100% · Australia · Environmental Services
    103. E.D.P Health, Safety and Environment Consultants Limited* 100% · United Kingdom · Environmental Services
    104. EDP Japan GK* 98% · Japan · Environmental Services
    105. EDP Singapore Pte. Ltd* 100% · Singapore · Environmental Services
    106. Eib Group Limited 100% · United Kingdom · Holding Company
    107. Eib Growth Services Limited* 100% · United Kingdom · Non-Trading Company
    108. Eib Professional Services Limited* 100% · United Kingdom · Environmental Consultancy
    109. Electrokinetic Limited* 100% · United Kingdom · Non-Trading Company
    110. Elsym Installations Limited 100% · United Kingdom · Manufacturer of Electrical Equipment and Installation
    111. Entrainment Limited* 100% · United Kingdom · Scientific and Technical Services
    112. Envireau Ltd 100% · United Kingdom · Environmental Consultancy
    113. Enviresearch Limited 100% · United Kingdom · Environmental Consultancy
    114. Enviresearch Portugal Unipessoal Lda* 100% · Portugal · Regulatory Services
    115. Enviresearch Technologies Limited 100% · United Kingdom · Technology Services
    116. Enviroflow Management Limited 100% · United Kingdom · Business Support Services
    117. Envirolab Limited 100% · United Kingdom · Drainage Services
    118. Environmental Strategical Advice BV* 100% · Belgium · Environmental Consultancy
    119. Extent Heritage Pty Limited* 100% · Australia · Heritage Management and Archaeological Services
    120. Fellows Construction Consultants Ltd 100% · United Kingdom · Construction Consulting
    121. Fishtek Limited 100% · United Kingdom · Marine Consultancy
    122. FR Consultants Limited 100% · United Kingdom · Risk Consultancy
    123. Fusion Project Management* 100% · United Kingdom · Architectural Activities
    124. Geocore Site Investigations Limited 100% · United Kingdom · Site Investigation Services
    125. GeoExperts GmbH* 100% · Germany · Environmental Engineering
    126. Global Rail Construction Limited 100% · United Kingdom · Rail Services
    127. Global Rail Services Limited 100% · Ireland · Rail Services
    128. Gold Coast Water Collective Pty Ltd* 100% · Australia · Economic Development Consultancy
    129. Gridflex Ltd* 51% · United Kingdom · Construction Consultancy
    130. GHI Renewables Limited 100% · United Kingdom · Renewable Heat Solutions
    131. GRSL Limited* 100% · Ireland · Rail Services
    132. Hawkins Electrical Holdings Limited 100% · United Kingdom · Holding Company
    133. Hawkins Electrical Limited* 100% · United Kingdom · Electrical Service Provider
    134. Headland Archaeology (UK) Limited 100% · United Kingdom · Archaeological Services
    135. Hollywood Civil Engineering Limited 100% · United Kingdom · Civil and Mechanical Engineering
    136. Homer Burgess Limited 100% · United Kingdom · Mechanical Engineering
    137. HPD Designing Consultants Private Limited 51% · India · Design Consultancy
    138. Hydrofix Limited 100% · United Kingdom · Marine Geoscience Consultancy
    139. Ian Farmer Associates (1998) Limited 100% · United Kingdom · Site Investigation Services
    140. Inis Environmental Consultants Limited 100% · Ireland · Environmental Consultancy
    141. Interactive Comms Limited* 100% · Ireland · Engineering Consultancy
    142. Irish Drilling Limited 100% · Ireland · Mineral Exploration
    143. J & A Pelling Ltd 100% · United Kingdom · Facilities Management
    144. JB Site Investigations Limited 100% · United Kingdom · Drilling and Site Investigations
    145. Jennings O'Donovan and Partners Limited* 100% · Ireland · Energy & Water Consultancy
    146. Keegans Limited* 100% · United Kingdom · Quantity Surveying Activities
    147. Kendall Kingscott Limited 100% · United Kingdom · Architectural Activities
    148. Kiely McCarthy Consulting Engineers Limited 100% · Ireland · Energy & Water Consultancy
    149. Kirton Water Treatment Services Limited 100% · United Kingdom · Water Treatment Services
    150. KMGP Limited 100% · United Kingdom · Engineering Consultancy
    151. Knockridge Investments Limited* 100% · Ireland · Holding Company
    152. Larsen Water Management Ire Limited 100% · Ireland · Water Consultancy
    153. Larsen Water Management Ltd 100% · United Kingdom · Water Consultancy
    154. Leap Environmental Limited 100% · United Kingdom · Environmental Consultancy
    155. MG Scaffolding (Oxford) Limited 100% · United Kingdom · Scaffolding Company
    156. Milestone Communications Limited 100% · United Kingdom · Engineering Consultancy
    157. Minerex Environmental Limited 100% · Ireland · Environmental Consultancy
    158. MSS Consulting Limited* 100% · United Kingdom · Environmental Services
    159. MSS Environmental Limited* 100% · United Kingdom · Environmental Services
    160. MSS Facilities Services Ltd* 100% · United Kingdom · Environmental Services
    161. MSS Group Limited 100% · United Kingdom · Holding Company
    162. MSS Water Limited* 100% · United Kingdom · Environmental Services
    163. MWH Constructors Limited* 100% · United Kingdom · Non-Trading Company
    164. MWH Farrer Limited* 100% · United Kingdom · Engineering Consultancy
    165. MWH Limited* 100% · United Kingdom · Environmental and Facilities Management
    166. MWH Treatment Limited* 100% · United Kingdom · Non-Trading Company
    167. MWH UK Acquisitions Limited 100% · United Kingdom · Holding Company
    168. Nature Positive Limited* 100% · United Kingdom · Environmental Consultancy
    169. N-Able Holdings Ltd 100% · United Kingdom · Holding Company
    170. N-Able Property Services Ltd* 100% · United Kingdom · Development of Building Projects
    171. Nicholas O'Dwyer & Company Limited* 100% · Ireland · Engineering Consultancy
    172. Nicholas O'Dwyer Design & Development Limited* 100% · Ireland · Engineering Consultancy
    173. Nicholas O'Dwyer Limited* 100% · Ireland · Engineering Consultancy
    174. Nicholas O'Dwyer Limited 100% · United Kingdom · Engineering Consultancy
    175. Non Entry Systems Limited 100% · United Kingdom · Manufacturing of machinery
    176. Non Destructive Testing Services Limited 100% · United Kingdom · Testing Services
    177. Optimus Plus (Aberdeen) Limited* 100% · United Kingdom · Sustainable Energy Solutions
    178. Optisol Services Ltd 100% · United Kingdom · Engineering Construction
    179. PA Group (UK) Limited 100% · United Kingdom · Inspection and Testing Services
    180. PB Drilling Limited* 100% · United Kingdom · Drilling Activities
    181. PD & MS (Dundee) Limited* 100% · United Kingdom · Non-Trading Company
    182. PD & MS Energy (Aberdeen) Limited* 100% · United Kingdom · Sustainable Energy Solutions
    183. PD & MS Energy (Azerbaijan) LLC* 100% · Azerbaijan · Non-Trading Company
    184. PD&MS Holdings Limited* 100% · United Kingdom · Holding Company
    185. Pegasys Limited 100% · United Kingdom · Consultancy Activities
    186. Pegasys Global Consulting Proprietary Limited* 100% · South Africa · Consultancy Activities
    187. Pegasys International Holdings Proprietary Limited* 100% · South Africa · Holding Company
    188. Pegasys Proprietary Limited* 75% · South Africa · Consultancy Activities
    189. Pegasys Strategy and Development Proprietary Limited* 49% · South Africa · Consultancy Activities
    190. Pelling Limited 100% · United Kingdom · Architectural Services
    191. Pellings LLP* 100% · United Kingdom · Administration Services
    192. Pensar Building Pty Ltd* 100% · Australia · Infrastructure Solutions Provider
    193. Pensar Commercial Pty Ltd* 100% · Australia · Engineering & Project Management
    194. Pensar Construction Group Pty Ltd* 100% · Australia · Holding Company
    195. Pensar Project Infrastructure Pty Ltd* 100% · Australia · Infrastructure Solutions Provider
    196. Pensar Structures Pty Ltd* 100% · Australia · Infrastructure Solutions Provider
    197. Pensar Utilities Pty Ltd* 100% · Australia · Infrastructure Solutions Provider
    198. Pensar Water Pty Ltd* 100% · Australia · Infrastructure Solutions Provider
    199. Pharos Field Engineering Services Limited 100% · United Kingdom · Infrastructure Services
    200. Pharos Generator Services Limited 100% · United Kingdom · Maintenance Services
    201. Prizebreak Limited 100% · Ireland · Holding Company
    202. Proeon Systems Limited 100% · United Kingdom · Engineering Services
    203. Project Ires Bidco Limited* 100% · United Kingdom · Sustainable Energy Solutions
    204. Project Ires Topco Limited 100% · United Kingdom · Holding Company
    205. Project Milner Limited 100% · United Kingdom · Engineering Consultancy
    206. Projence Pty Ltd* 100% · Australia · Project Management
    207. Quality Solutions International Limited* 68% · New Zealand · Environmental Consultancy
    208. Quantum Geotechnic Limited* 100% · United Kingdom · Environmental Consultancy
    209. R.J.T Excavations Limited 100% · United Kingdom · Groundworks
    210. Remedx Limited 100% · United Kingdom · Remediation Design and Contracting
    211. RGM Environment Proprietary Limited* 56% · South Africa · Site Management Services
    212. Richard Allitt Associates Limited 100% · United Kingdom · Engineering Consultancy
    213. Richard Irvin FM Limited 100% · United Kingdom · Electrical Service Provider
    214. ROCP Limited 100% · United Kingdom · Civil and Geotechnical Engineering
    215. RSK (Ireland) Limited 100% · United Kingdom · Environmental Consulting & Remediation
    216. RSK Acoustics Limited 100% · United Kingdom · Noise and Vibrations Consultancy
    217. RSK ADAS Europe (Ireland) Limited* 100% · Ireland · Environmental Consultancy
    218. RSK ADAS Limited 100% · United Kingdom · Environmental Consultancy
    219. RSK Alenco GmbH 100% · Germany · Environmental Consultancy
    220. RSK Biocensus Limited 100% · United Kingdom · Ecology Consultancy Services
    221. RSK Boden + Wasser GmbH 100% · Austria · Environmental Services
    222. RSK CFSE Pte. Ltd. (formerly RSK Centre for Sustainability Excellence PTE LTD) 100% · Singapore · Energy & Sustainability Services
    223. RSK Cevre Hizmetleri Anonim Sirketi 100% · Turkey · Environmental, Health & Safety Services
    224. RSK Dominican Republic S.R.L 100% · Dominican Republic · Non-Trading Company
    225. RSK Energy BV* 56.7% · Belgium · Energy & Sustainability Services
    226. RSK Environment (East Africa) Limited 100% · Tanzania · Environmental Consultancy
    227. RSK Environment (Ireland) Limited 100% · Ireland · Non-Trading Company
    228. RSK Environment (Isle of Man) Limited 100% · Isle of Man · Non-Trading Company
    229. RSK Environment (Kenya) Ltd 100% · Kenya · Environmental Consultancy
    230. RSK Environment (Tanzania) Limited* 80% · Tanzania · Environmental Consultancy
    231. RSK Environment (Uganda) Limited 100% · Uganda · Environmental Consultancy
    232. RSK Environment Australia PTY Ltd 100% · Australia · Environmental Consultancy
    233. RSK Environnement Holding SAS 100% · France · Holding Company
    234. RSK Environment Italia SRL 83% · Italy · Environmental Consultancy
    235. RSK Environnement SAS 100% · France · Environmental Services
    236. RSK Environment SHPK* 90% · Albania · Environmental Consultancy
    237. RSK Environment Switzerland GMBH 100% · Switzerland · Environmental Consultancy
    238. RSK Environment WLL 49% · Qatar · Environmental Services
    239. RSK Environmental LLC SPC 100% · UAE · Environmental Consultancy
    240. RSK Falkland Islands Limited 90% · Falkland Islands · Construction Services
    241. RSK NOD Pty Ltd 100% · South Africa · Site Management Services
    242. RSK Hi-Line Limited 100% · United Kingdom · Environmental Consultancy
    243. RSK India Engineering Centre Private Limited 88% · India · Engineering Consultancy
    244. RSK Integrated Waste Solutions Limited 100% · United Kingdom · Waste Management Services
    245. RSK Investments Limited 100% · United Kingdom · Investment Company
    246. RSK Land and Development Engineering Limited 85% · United Kingdom · Civil Engineering
    247. RSK Nature Repair Limited 51% · United Kingdom · Environmental Consulting Activities
    248. RSK Netherlands (Eerland Milieutechniek Nederland) BV 51% · Netherlands · Site Investigation
    249. RSK New Zealand Limited 68% · New Zealand · Environmental Consultancy
    250. RSK Orbital Limited 100% · United Kingdom · Surveying
    251. RSK Polska Sp. Z.O.O 100% · Poland · Environmental Services
    252. RSK Project Services Limited 100% · United Kingdom · Project Management
    253. RSK Radiological Limited 100% · United Kingdom · Environmental Consulting
    254. RSK Raw Limited 100% · United Kingdom · Specialist Services
    255. RSK Soluciones Ambientales, S.L. 100% · Spain · Engineering Consultancy
    256. RSK Stats Environment Health and Safety Limited 100% · United Kingdom · Non-Trading Company
    257. RSK Stats Geoconsult Limited 100% · United Kingdom · Non-Trading Company
    258. RSK Stats Limited 1 100% · United Kingdom · Non-Trading Company
    259. RSK Utility Consulting Limited* 100% · United Kingdom · Utilities Consultancy
    260. RSKW Ltd 100% · United Kingdom · Environmental Consultancy
    261. Salix River and Wetland Services Limited 100% · United Kingdom · Construction Services
    262. Salix Australia Pty Ltd* 80% · Australia · Construction Services
    263. SES Strategic Limited* 100% · United Kingdom · Landscape Design
    264. Silcock Leedham Consulting Engineers Limited* 100% · United Kingdom · Engineering Consultancy
    265. Silcock Leedham Group Ltd 100% · United Kingdom · Holding Company
    266. Singleton Clamp & Partners Limited 100% · United Kingdom · Engineering Consultancy
    267. SJA Construction Services Limited* 100% · New Zealand · Construction Consultancy
    268. SJA Construction Services PTE. Ltd* 100% · Singapore · Project Management
    269. SJA Construction Services Pty Limited* 100% · Australia · Construction Consultancy
    270. SkyVision International Limited* 100% · United Kingdom · Architectural Services
    271. SLCE Project Management Services LLC* 100% · UAE · Project Management
    272. Smith & Kennedy Architects Limited 100% · Ireland · Architectural Services
    273. Soilution BV* 51% · Netherlands · Soil Research and Remediation
    274. Sonic Drilling & Piling Planthire Limited 100% · United Kingdom · Plant Hire
    275. Southern Ecological Solutions Limited 100% · United Kingdom · Environmental Consultancy
    276. Spencer Quantum Limited 100% · United Kingdom · Environmental Services
    277. Stephenson Halliday Limited 100% · United Kingdom · Environmental Consultancy
    278. Streetwise UK Management Limited 100% · United Kingdom · Traffic Management Services
    279. Structural Soils Limited 100% · United Kingdom · Ground Investigations & Geotechnical Consultancy
    280. Sustainable Aquafarms Limited 100% · United Kingdom · Fish Farming & Pisciculture
    281. Synergie Environ Limited* 100% · United Kingdom · Energy Engineering
    282. Tarpave Limited 75% · United Kingdom · Paving Contractor
    283. TBF Scaffolding Ltd 100% · United Kingdom · Scaffolding Services
    284. TBF Traffic Ltd 100% · United Kingdom · Traffic Management
    285. Technik Ground Solutions Limited 100% · United Kingdom · Geotechnical Specialists
    286. Terraffix Soil Solutions Ltd* 100% · United Kingdom · Soil Research
    287. The Scan Station Limited* 60% · United Kingdom · Specialist Services
    288. The Woodhouse Partnership Limited 100% · United Kingdom · Asset Management
    289. The Woodhouse Partnership North America Ltd* 100% · USA · Asset Management
    290. Travis Baker Limited 100% · United Kingdom · Engineering Consultancy
    291. Treefellers Limited 100% · United Kingdom · Arboriculture Services
    292. Triune Investments Pty Ltd* 70% · Australia · Water Management
    293. Twig Trading Limited* 100% · United Kingdom · Habitat Management
    294. TWPL Consulting Services LTDA* 90% · Brazil · Asset Management
    295. Up And Under (Specialist Contracts) Ltd* 100% · United Kingdom · Construction Services
    296. Up And Under Group Limited 100% · United Kingdom · Site Investigation Services
    297. Up And Under Limited 100% · United Kingdom · Engineering Consultancy
    298. Virtus Energy Limited 51% · United Kingdom · EV Charging Installations
    299. W.G.M (Engineering) Limited 100% · United Kingdom · Engineering Services
    300. Waldrams Limited 100% · United Kingdom · Chartered Surveyors
    301. Water Research Centre Limited 100% · United Kingdom · Technical Research
    302. Water Research Centre SPC* 100% · Oman · Technical Research
    303. Watertrain Limited 100% · United Kingdom · Technical Training
    304. We are Brandnew Ltd 51% · United Kingdom · Advertising Agency
    305. Windtechs Ltd* 100% · United Kingdom · Wind Turbine Maintenance
    306. Wyse Group Limited 100% · United Kingdom · Holding Company
    307. WysePower B.V* 100% · Netherlands · Temporary Site Services
    308. Wysepower Limited* 100% · United Kingdom · Temporary Site Services
    309. Zero Energy Design Ltd* 100% · United Kingdom · Engineering Services

Significant events

Auditor, going-concern and subsidiary information is drawn from the narrative of the latest annual accounts. About these numbers

People

50 active · 44 resigned

Name Role Appointed Born Nationality
EVANS, Sally Secretary 2019-08-09
ANCHOR, David Director 2014-08-26 Sep 1971 British
BAILEY, Jonathan David Director 2015-10-26 Aug 1973 British
BEESLEY, Darren Paul Director 2023-08-16 Jan 1974 British
BELL, Alexander John Director 2019-11-12 Jan 1978 British
BENDELL, Rachel Susannah Jane Director 2020-03-01 Jan 1978 British
BOARD, Nigel Paul Director 2002-01-01 Apr 1963 British
BOULTER, Simon Director 2022-12-15 May 1981 British
CARTER, Richard Nicholas, Dr Director 2021-06-03 Jan 1952 British
CHARNOCK, Garry Director 2005-12-15 Mar 1954 British
COLLIE, Fergus Anderson Director 2012-04-01 Dec 1952 British
COOPER, Katrina Maria Director 2006-12-15 Mar 1962 British
CROFTS, David Benjamin, Dr Director 2016-05-25 Jan 1973 British
DOMENEY, Robin Alistair Director 2012-11-14 Aug 1970 British
FRAIN, Christopher Mark Director 2016-01-04 Apr 1971 British
GAMBLE, Sean Alasdair Mcdonald Director 2012-09-01 Dec 1961 British
GOODACRE, Ian Robert, Dr Director 2012-09-01 May 1972 British
GROSSEY, Timothy Director 2016-04-21 Apr 1977 British
HARMER, Sarah Madeleine Director 2012-04-01 Mar 1974 British
HENMAN, Tom Director 2017-01-27 Jan 1971 British
HERLIHY, Francis Director 2025-04-01 Jan 1966 British
HOGBEN, Wendy Patricia Director 2008-04-01 Apr 1969 British
HOLDING, Timothy Director 2018-01-02 Jul 1973 British
HUTCHINSON, Neil Director 2016-06-01 Aug 1975 British
KEEN, Haydn Director 2016-08-01 Feb 1971 British
KENNEDY, Corinne Patricia Director 2023-08-16 Apr 1976 British
KIRK, Stephen John Director 2019-11-12 Sep 1963 British
KNIGHTON, Claire Ashley Director 2021-06-03 Nov 1973 British
LEACH, Jeremy Director 2023-08-16 Sep 1984 British
MARKWICK, Andrew Paul Director 2025-11-07 Apr 1980 English
MASON, Michael William Director 1995-05-01 Oct 1964 British
MOGFORD, Sarah Anne Louise Director 2012-04-01 Aug 1971 British
PERCIVAL, Warren Lee Director 2013-05-13 Jul 1980 British
ROBINSON-MOLTKE, Victoria Director 2021-09-30 Feb 1983 British
RYDER, Alasdair Alan Director 1989-03-22 Sep 1961 British
SELVES, Nicolas William Director 2012-04-01 Sep 1949 British
SHARP, Duncan Lindsey Director 2023-08-16 Oct 1976 British
SMYTH, Mary Ann Elizabeth, Dr Director 1994-03-25 Mar 1962 British
STEWARD, Mark Director 2013-01-03 Nov 1967 British
STRUDWICK, Ian Harry Director 1996-02-22 Feb 1969 British
THOMAS, Lucy Director 2012-09-01 Jun 1976 British
TUCKWELL, George William, Dr Director 2012-04-01 Oct 1973 British
WATSON, David Director 2011-11-01 Nov 1965 British
WHITE, Duncan Ian Director 2019-11-12 Feb 1977 British
WILLIAMS, Shon Gwyn Owen Director 2012-04-01 May 1962 British
WILSON, Ian Michael Director 2023-08-16 Feb 1967 British
WILSON, Jennefer Alison Director 1998-07-01 Mar 1955 British
WITHERINGTON, Peter John Director 2002-02-06 May 1951 British
YOUNG, Carolyn Jane, Dr Director 2008-01-14 Jan 1967 British
YOUNG, Gary Donald Director 2023-01-24 Sep 1961 British
Show 44 resigned officers
Name Role Appointed Resigned
MILLS, Steven Secretary 2009-01-19 2019-08-09
RYDER, Alasdair Alan, Dr Secretary 2003-01-14 2009-01-19
RYDER, Sheila Caroline, Dr. Secretary 1999-02-22 2003-01-14
STRONACHS Corporate Nominee Secretary 1989-01-11 1999-02-22
ADAMS, Roger Charles Director 2017-12-21 2024-11-07
AUSTIN, Nigel Brian Director 2014-01-13 2024-03-19
BOULTER, Ann Director 2012-04-01 2018-10-08
BOULTER, Simon Director 2016-10-25 2020-03-09
BROWN, David Andrew Director 2006-05-15 2007-08-10
CLARK, Jon Director 2012-04-01 2014-09-30
CLEWES, William Desmond Director 2012-09-01 2014-10-31
DITCHFIELD, Ian Director 2018-02-06 2025-01-31
DRAPER, Abigail Sarah Director 2018-03-12 2025-03-31
DUNCAN, Colin Director 1996-02-22 1997-08-08
FOX, Melissa Gayle Director 2013-09-27 2025-12-31
GRAFTON, Andrew Director 2012-04-01 2016-04-18
HILSDON, Mark Director 2016-09-27 2019-09-27
JAQUES, Robert Michael Director 1997-09-03 2016-04-01
JONES, Gareth Thomas Director 2012-04-01 2022-02-28
JONES, John Roger Director 2006-01-13 2015-12-08
KEMP, Anne Director 1996-01-04
KENWORTHY, John Bernard Director 1990-01-05 1994-03-30
LEDNOR, Martin Charles Director 1994-04-01 1996-01-08
LEWIS, Brian Director 2012-05-01 2026-03-31
MARSH, Adrian Harris Director 2012-04-01 2023-11-02
MCGUICKEN, Gary James Director 2012-04-01 2024-02-28
PARKINSON, Philip Graham Director 1996-12-07 2010-10-30
PETERSEN, Robert Director 2002-02-06 2003-06-20
PETTITT, Stephen Director 2016-08-01 2024-03-19
PRESCOTT, Neal James Director 2018-01-17 2024-03-31
PRESCOTT, Neal James Director 2012-05-31 2013-05-10
ROBERTSON, James Matheson Nominee Director 1989-01-11 1989-03-22
SIMS, Ian, Dr Director 2012-04-01 2024-02-15
SLJIVIC, Susan Director 1990-01-05 2020-03-31
STEARNS, Paul Stephen Director 2012-04-01 2013-05-31
SWAN, Dorothy Janet, Dr Director 2002-12-24 2022-03-01
TAYLOR, David Iain Director 1998-07-06 2026-03-31
TIBBLE, Sophie Director 2003-01-01 2005-12-31
UPTON, Paul Stewart, Dr Director 2015-12-04 2025-08-05
VIOLA, Claudio Director 2002-11-26 2006-12-19
WEBER, Robert Charles Director 2003-03-03 2006-12-19
WELLS, Roger Murray Director 1996-03-31 1999-06-22
WHIPP, Peter Frederick Director 2016-09-12 2025-12-24
WILSON, Jenny Ann Director 2018-06-01 2018-07-04

Ownership

Persons with significant control

Name Kind Nature of control Notified Status
Ares Management Ltd Corporate entity Appoints directors, significant-influence-or-control-as-firm 2019-01-04 Ceased 2019-01-04
Rsk Group L:Imited Corporate entity Shares 75–100% 2018-11-02 Ceased 2018-11-03
Ares Management Limited Corporate entity Shares 75–100% 2018-10-25 Active
Rsk Group Plc Corporate entity Shares 75–100%, Voting 75–100%, Appoints directors, significant-influence-or-control-as-firm 2016-06-01 Ceased 2018-11-02
U.S Bank Trustees Limited Corporate entity Shares 75–100%, Voting 75–100%, Appoints directors 2016-04-06 Ceased 2018-11-02
Rsk Group Limited Corporate entity Voting 75–100%, Appoints directors 2016-04-06 Active

Filing timeline

Last 20 of 488 total filings

Date Type Category Description
2026-04-09 TM01 officers Termination director company with name termination date PDF
2026-03-31 TM01 officers Termination director company with name termination date PDF
2026-01-15 CH01 officers Change person director company with change date PDF
2026-01-06 TM01 officers Termination director company with name termination date PDF
2025-12-29 MR01 mortgage Mortgage create with deed with charge number charge creation date PDF
2025-12-24 TM01 officers Termination director company with name termination date PDF
2025-12-22 SH01 capital Capital allotment shares PDF
2025-12-22 MR01 mortgage Mortgage create with deed with charge number charge creation date PDF
2025-12-22 MR01 mortgage Mortgage create with deed with charge number charge creation date PDF
2025-12-11 MR04 mortgage Mortgage satisfy charge part PDF
2025-12-11 MR04 mortgage Mortgage satisfy charge part PDF
2025-12-09 CH01 officers Change person director company with change date PDF
2025-12-01 AA accounts Accounts with accounts type full
2025-11-26 AP01 officers Appoint person director company with name date PDF
2025-10-20 CS01 confirmation-statement Confirmation statement with no updates PDF
2025-10-16 CH01 officers Change person director company with change date PDF
2025-09-04 ANNOTATION miscellaneous Legacy
2025-09-04 ANNOTATION miscellaneous Legacy
2025-09-02 CH01 officers Change person director company with change date PDF
2025-08-15 TM01 officers Termination director company with name termination date PDF

Public-record activity

Raw counts from Companies House — last 12–24 months

Filings
20

last 12 months

Capital events
1

last 24 months

Officers appointed
1

last 12 months

Officers resigned
5

last 12 months

Direct counts from the register. No score, no rating — see the Filing timeline for the underlying events.

Year-on-year

Latest filed period vs the prior one

Accounts are PDF-filed; numeric extraction for this statement type (this accounts) is not yet supported in StatDesk. See the Companies House filing for the underlying figures.

Official Companies House page