CROWCON DETECTION INSTRUMENTS LIMITED
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Next accounts due
2026-12-31 (in 7mo)
Last filed for 2025-03-31
Confirmation statement due
2026-09-23 (in 4mo)
Last made up 2025-09-09
Watchouts
None on the register
Cash
£3M
+12.4% vs 2024
Net assets
£21M
+5.3% vs 2024
Employees
179
+3.5% vs 2024
Profit before tax
£12M
-2.3% vs 2024
Name history
Renamed 2 times since incorporation
- CROWCON DETECTION INSTRUMENTS LIMITED 1992-01-08 → present
- CROWCON INSTRUMENTS LIMITED 1986-10-10 → 1992-01-08
- CROWCON (INSTRUMENTS) LIMITED 1970-05-06 → 1986-10-10
Net assets
2-year trend · vs Technology median
Accounts
2-year trend · latest reflected 2025-03-31
| Metric | Trend | 2024-03-31 | 2025-03-31 |
|---|---|---|---|
| Turnover | £45,391,730 | £46,119,065 | |
| Operating profit | £12,120,556 | £12,239,461 | |
| Profit before tax | £12,584,578 | £12,295,618 | |
| Net profit | £9,472,363 | £9,279,197 | |
| Cash | £2,723,829 | £3,061,129 | |
| Total assets less current liabilities | £21,217,332 | £28,112,729 | |
| Net assets | £19,474,502 | £20,503,699 | |
| Equity | £19,474,502 | £20,503,699 | |
| Average employees | 173 | 179 | |
| Wages | £7,847,785 | £8,339,015 |
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 | 2024-03-31 | 2025-03-31 |
|---|---|---|---|
| Operating margin | 26.7% | 26.5% | |
| Net margin | 20.9% | 20.1% | |
| Return on capital employed | 57.1% | 43.5% | |
| Current ratio | 3.60x | 3.36x | |
| Interest cover | 213.76x | 93.16x |
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 101
- Reporting scope
- Standalone (parent only)
- Auditor
- PricewaterhouseCoopers LLP
- Audit opinion
- Unqualified (clean)
- Going concern
- Affirmed
“The Directors believe there is no material uncertainty in the use of the going concern assumption, having considered forecasts up to 30 September 2026 showing profitability even in a severe downside scenario, and confirming access to liquid resources.”
Auditor, going-concern and subsidiary information is drawn from the narrative of the latest annual accounts. About these numbers
People
6 active · 37 resigned
| Name | Role | Appointed | Born | Nationality |
|---|---|---|---|---|
| MCCARTHY, Terence Michael | Secretary | 2014-12-01 | — | — |
| BROWNE, Nicola Kate | Director | 2023-09-18 | Nov 1973 | British |
| DYER, Jamie Nicholas | Director | 2022-04-21 | Jul 1981 | British |
| JARDINE, Graham | Director | 2019-05-15 | Jul 1970 | British |
| MCCARTHY, Terence Michael | Director | 2014-12-01 | Mar 1965 | British |
| VAUX, Michael | Director | 2023-09-18 | Apr 1993 | British |
Show 37 resigned officers
| Name | Role | Appointed | Resigned |
|---|---|---|---|
| SEABROOK, John Philip Antony | Secretary | — | 2002-10-04 |
| WORTHINGTON, Keith Alan | Secretary | 2002-11-20 | 2014-12-01 |
| BARNHAM, Marion | Director | 2022-04-21 | 2022-12-01 |
| BOL, Gustaaf | Director | 2000-10-01 | 2008-04-01 |
| CALLARD, Peter | Director | 2015-07-30 | 2017-05-15 |
| DUNN, Paul Martin | Director | 2003-12-01 | 2008-10-31 |
| EARLY, Louise Elizabeth | Director | 2019-07-25 | 2021-04-30 |
| FREW, David | Director | 1995-10-30 | 2000-12-15 |
| GARSIDE, Brian George | Director | 2000-11-28 | 2003-10-31 |
| GRAVESTOCK, James | Director | 2017-01-01 | 2021-08-13 |
| GREENHAM, Leigh Kent | Director | — | 2005-04-30 |
| HUNT, Bernard Charles | Director | — | 1993-06-30 |
| JESSOP, Ralph Richard | Director | — | 2001-05-31 |
| KUKULA, Stefan John, Dr | Director | 2006-01-03 | 2009-07-31 |
| LEAROYD, Michael Philip | Director | — | 1994-04-08 |
| LYONS, John Blakeney | Director | 1999-03-01 | 1999-12-06 |
| MACKAY, Frazer | Director | 2017-05-15 | 2020-07-20 |
| MICHAUD, Antoine | Director | 2009-02-13 | 2010-04-30 |
| O'SHEA, Stephen Robert | Director | 1994-04-06 | 1994-10-01 |
| OPHIELD, Michael | Director | 2011-06-17 | 2016-10-27 |
| OSBORNE, Mark Jonathan | Director | 2010-12-01 | 2014-12-01 |
| PAYEN, Alan Etienne | Director | — | 1999-11-06 |
| PULISCIANO, Anna | Director | 2021-04-20 | 2023-04-06 |
| QUINN, Neil Anthony | Director | 2010-10-22 | 2015-05-14 |
| REES, James Warren | Director | 2007-11-12 | 2011-09-30 |
| ROSSITER, Neil | Director | 2004-11-26 | 2008-05-23 |
| ROY, Keith John | Director | 2001-06-01 | 2007-09-30 |
| SEABROOK, John Philip Antony | Director | — | 2002-10-04 |
| SMITH, Alison Jacqueline | Director | 2012-05-01 | 2017-06-09 |
| STAMPER, Allan | Director | 2002-07-01 | 2008-04-30 |
| SWIFT, Barry | Director | 2013-05-01 | 2017-03-30 |
| TRODD, Nigel James Benedict | Director | 2008-11-01 | 2010-10-22 |
| TURNER, Peter Michael Fisher | Director | 2000-12-15 | 2001-11-08 |
| WEBSTER, Neil | Director | 2019-05-15 | 2025-10-17 |
| WILSON, John Linday | Director | 2000-11-28 | 2003-12-01 |
| WOODWARD, Stuart James | Director | 2010-02-01 | 2013-01-22 |
| WORTHINGTON, Keith Alan | Director | 2002-11-20 | 2014-12-01 |
Ownership
Persons with significant control
| Name | Kind | Nature of control | Notified | Status |
|---|---|---|---|---|
| Halma Plc | Corporate entity | Shares 75–100%, Voting 75–100%, Appoints directors, Significant influence | 2016-04-06 | Active |
Filing timeline
Last 20 of 188 total filings
| Date | Type | Category | Description | |
|---|---|---|---|---|
| 2025-12-19 | AA | accounts | Accounts with accounts type full | |
| 2025-10-17 | CS01 | confirmation-statement | Confirmation statement with no updates | |
| 2025-10-17 | TM01 | officers | Termination director company with name termination date | |
| 2024-12-05 | AA | accounts | Accounts with accounts type full | |
| 2024-10-16 | CS01 | confirmation-statement | Confirmation statement with no updates | |
| 2023-11-28 | AA | accounts | Accounts with accounts type full | |
| 2023-09-22 | CS01 | confirmation-statement | Confirmation statement with no updates | |
| 2023-09-22 | AP01 | officers | Appoint person director company with name date | |
| 2023-09-22 | AP01 | officers | Appoint person director company with name date | |
| 2023-04-10 | TM01 | officers | Termination director company with name termination date | |
| 2022-12-20 | AA | accounts | Accounts with accounts type full | |
| 2022-12-06 | TM01 | officers | Termination director company with name termination date | |
| 2022-11-01 | CS01 | confirmation-statement | Confirmation statement with no updates | |
| 2022-06-08 | CH01 | officers | Change person director company with change date | |
| 2022-06-08 | CH01 | officers | Change person director company with change date | |
| 2022-05-16 | AP01 | officers | Appoint person director company with name date | |
| 2022-05-16 | AP01 | officers | Appoint person director company with name date | |
| 2021-11-25 | AA | accounts | Accounts with accounts type full | |
| 2021-09-13 | CS01 | confirmation-statement | Confirmation statement with no updates | |
| 2021-08-13 | TM01 | officers | Termination director company with name termination date |
Public-record activity
Raw counts from Companies House — last 12–24 months
- Filings
- 3
- Capital events
- 0
- Officers appointed
- 0
- Officers resigned
- 1
last 12 months
last 24 months
last 12 months
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
-
Turnover
+1.6%
£45,391,730 £46,119,065
-
Cash
+12.4%
£2,723,829 £3,061,129
-
Net assets
+5.3%
£19,474,502 £20,503,699
-
Employees
+3.5%
173 179
-
Operating profit
+1%
£12,120,556 £12,239,461
-
Profit before tax
-2.3%
£12,584,578 £12,295,618
-
Wages
+6.3%
£7,847,785 £8,339,015
Each % is (latest − prior) ÷ |prior| for the line item as filed. The comparison is only shown when the latest and prior accounts cover broadly equal-length periods — short or long stubs (typical around incorporation or a year-end change) are suppressed rather than misrepresented. Lines a company doesn't report are omitted. About these numbers