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Next accounts due

2026-12-31 (in 7mo)

Last filed for 2025-03-31

Confirmation statement due

2026-10-23 (in 5mo)

Last made up 2025-10-09

Watchouts

None on the register

Cash

£1M

-38.4% lowest in 4 filed years

Net assets

£3M

-8.9% vs 2024

Employees

21

0% vs 2024

Profit before tax

£3M

+24.5% highest in 4 filed years

Name history

Renamed 1 time since incorporation

  1. HARWELL DOSIMETERS LIMITED 1995-03-10 → present
  2. WSM FORTY ONE LIMITED 1994-04-12 → 1995-03-10

Accounts

4-year trend · latest reflected 2025-03-31

Metric Trend 2022-03-312023-03-312024-03-312025-03-31
Turnover £4,875,891£5,418,618
Operating profit £2,590,644£3,254,053
Profit before tax £156,827£1,462,994£2,635,576£3,281,235
Net profit £151,866£1,190,020£1,973,993£2,460,602
Cash £1,553,578£2,320,403£2,250,944£1,386,569
Total assets less current liabilities £3,258,674£4,430,211£3,936,609£3,663,794
Net assets £3,074,550£4,264,570£3,816,113£3,476,715
Equity £3,074,550£4,264,570£3,816,113£3,476,715
Average employees 16212121
Wages £581,187£698,249£818,920£779,148

Values shown as filed in the company's annual accounts. indicates the figure wasn't present under that line item in that period. About these numbers

Ratios

Computed from the line items above — sparklines read oldest → newest

Ratio Trend 2022-03-312023-03-312024-03-312025-03-31
Operating margin 53.1%60.1%
Net margin 40.5%45.4%
Return on capital employed 65.8%88.8%
Current ratio 2.74x2.00x

Margins divide P&L lines by turnover. Gearing is liabilities over total assets. Current ratio is current assets over creditors falling due within one year. Interest cover is operating profit over absolute finance costs. Sector-distribution context coming next.

Audit & accounting basis

Accounting basis
FRS 102
Reporting scope
Standalone (parent only)
Auditor
WSM Advisors Limited
Audit opinion
Unqualified (clean)
Going concern
Affirmed

“For the year to 31 March 2025 the company made a profit amounting to £2,460,602 and had net assets of £3,476,715. Although the company is expected to be profitable, the company has also received confirmation from its intermediate parent undertaking, STERIS Limited, of its intention to provide support, where needed, for a period of at least 12 months from the date of approval of the accounts. The directors therefore have a reasonable expectation that the company has adequate resources to continue in operational existence for the foreseeable future. Accordingly, the directors continue to adopt the going concern basis of accounting in preparing the financial statements.”

Significant events

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

People

2 active · 15 resigned

Name Role Appointed Born Nationality
BURTON, Karen Louise Director 2025-11-14 May 1967 American
KOHLER, Kenneth Director 2025-05-15 Jun 1962 American
Show 15 resigned officers
Name Role Appointed Resigned
PYMER, David Secretary 2011-03-08 2017-07-03
TURNER, Jonathan Paul Secretary 2017-07-03 2017-09-25
YOUNG, Kirsty Secretary 2006-03-13 2011-03-08
WSM SERVICES LIMITED Corporate Secretary 1994-04-12 2006-03-13
BETT, Roger, Dr Director 1999-07-28 2005-01-21
EATON, Michael John Director 2017-07-03 2025-04-23
GROVES, Christopher Mark Director 1999-08-27 2004-01-31
HATTON, Christina Dorothy Director 1994-04-12 1995-03-01
PEARCE, Harold James Director 1995-03-01 1999-08-27
RENDLE, Peter John Director 2017-09-25 2020-05-07
STEBBING, Gavin Frederick Mark Director 1995-03-01 2005-01-21
TILLING, Peter Thomas Director 2005-01-21 2017-07-03
TOKICH, Michael Joseph Director 2017-07-03 2025-11-14
TURNER, Jonathan Paul Director 2017-07-03 2017-09-25
YOUNG, Trevor George Director 1999-08-27 2004-01-31

Ownership

Persons with significant control

Name Kind Nature of control Notified Status
Synergy Health Holdings Limited Corporate entity Shares 75–100%, Voting 75–100%, Appoints directors 2017-07-03 Active
Mr Peter Thomas Tilling Individual Shares 75–100% 2016-04-06 Ceased 2017-07-03

Filing timeline

Last 20 of 140 total filings

Date Type Category Description
2025-11-17 AP01 officers Appoint person director company with name date PDF
2025-11-17 TM01 officers Termination director company with name termination date PDF
2025-10-23 CS01 confirmation-statement Confirmation statement with no updates PDF
2025-10-06 AA accounts Accounts with accounts type full PDF
2025-06-03 AP01 officers Appoint person director company with name date PDF
2025-05-22 TM01 officers Termination director company with name termination date PDF
2025-02-07 AA accounts Accounts with accounts type full PDF
2024-10-23 CS01 confirmation-statement Confirmation statement with no updates PDF
2024-02-09 AA accounts Accounts with accounts type full PDF
2023-10-11 CS01 confirmation-statement Confirmation statement with no updates PDF
2023-01-10 AA accounts Accounts with accounts type full
2022-10-21 CS01 confirmation-statement Confirmation statement with no updates PDF
2022-01-05 AA accounts Accounts with accounts type full
2021-10-19 CS01 confirmation-statement Confirmation statement with no updates PDF
2021-07-30 AD01 address Change registered office address company with date old address new address PDF
2021-07-19 CH01 officers Change person director company with change date PDF
2020-12-03 AA accounts Accounts with accounts type full
2020-11-16 AD03 address Move registers to sail company with new address PDF
2020-11-16 AD02 address Change sail address company with new address PDF
2020-11-13 CS01 confirmation-statement Confirmation statement with no updates PDF

Public-record activity

Raw counts from Companies House — last 12–24 months

Filings
6

last 12 months

Capital events
0

last 24 months

Officers appointed
2

last 12 months

Officers resigned
1

last 12 months

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

Year-on-year

FY2024 → FY2025 · period ending 2025-03-31 vs 2024-03-31

Each % is (latest − prior) ÷ |prior| for the line item as filed. Periods don't have to be exactly 12 months apart — a long or short period (typical around incorporation or year-end changes) will distort the comparison. Lines a company doesn't report are omitted. About these numbers

Official Companies House page