CARBON UNDERWRITING LIMITED
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Next accounts due
2026-09-30 (in 4mo)
Last filed for 2024-12-31
Confirmation statement due
2026-09-08 (in 4mo)
Last made up 2025-08-25
Watchouts
None on the register
Cash
£3M
+41.2% highest in 6 filed years
Net assets
£10M
+141.1% highest in 6 filed years
Employees
57
+29.5% highest in 6 filed years
Profit before tax
£7M
+52% vs 2023
Net assets
6-year trend · vs Financials median
Accounts
6-year trend · latest reflected 2024-12-31
| Metric | Trend | 2020-02-29 | 2021-02-28 | 2022-02-28 | 2022-12-31 | 2023-12-31 | 2024-12-31 |
|---|---|---|---|---|---|---|---|
| Turnover | — | — | — | — | £14,215,041 | £18,627,372 | |
| Operating profit | — | — | — | — | £4,627,780 | £6,869,898 | |
| Profit before tax | — | — | — | — | £4,529,669 | £6,885,397 | |
| Net profit | — | — | — | — | £4,799,587 | £5,843,906 | |
| Cash | £4,255 | £252,115 | £329,461 | £342,179 | £1,892,602 | £2,672,586 | |
| Total assets less current liabilities | -£1,387,045 | -£1,320,253 | -£250,500 | £263,143 | £4,308,376 | £10,137,012 | |
| Net assets | — | -£1,320,253 | -£1,869,158 | £263,143 | £4,141,025 | £9,984,931 | |
| Equity | -£1,387,045 | -£1,320,253 | -£1,869,158 | £263,143 | £4,141,025 | £9,984,931 | |
| Average employees | 4 | 9 | 21 | 34 | 44 | 57 | |
| Wages | — | — | — | — | £5,863,663 | £7,881,345 | |
| Directors' remuneration | — | — | — | — | £1,005,374 | £914,014 |
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
Year-on-year
FY2023 → FY2024 · period ending 2024-12-31 vs 2023-12-31
-
Turnover
+31%
£14,215,041 £18,627,372
-
Cash
+41.2%
£1,892,602 £2,672,586
highest in 6 filed years
-
Net assets
+141.1%
£4,141,025 £9,984,931
highest in 5 filed years
-
Employees
+29.5%
44 57
highest in 6 filed years
-
Operating profit
+48.4%
£4,627,780 £6,869,898
-
Profit before tax
+52%
£4,529,669 £6,885,397
-
Wages
+34.4%
£5,863,663 £7,881,345
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
Ratios
Computed from the line items above — sparklines read oldest → newest
| Ratio | Trend | 2020-02-29 | 2021-02-28 | 2022-02-28 | 2022-12-31 | 2023-12-31 | 2024-12-31 |
|---|---|---|---|---|---|---|---|
| Operating margin | — | — | — | — | 32.6% | 36.9% | |
| Net margin | — | — | — | — | 33.8% | 31.4% | |
| Return on capital employed | — | — | — | — | 107.4% | 67.8% | |
| Current ratio | — | — | — | — | 2.17x | 3.02x | |
| Interest cover | — | — | — | — | 45.31x | — |
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.
Name history
Renamed 2 times since incorporation
- CARBON UNDERWRITING LIMITED 2019-07-08 → present
- JIGSAW INSURANCE SERVICES LIMITED 2018-10-09 → 2019-07-08
- JIGSAW INTERMEDIARY SERVICES LIMITED 2018-02-07 → 2018-10-09
Audit & accounting basis
- Accounting basis
- FRS 102
- Reporting scope
- Standalone (parent only)
- Auditor
- PKF Littlejohn LLP
- Audit opinion
- Unqualified (clean)
- Going concern
- Affirmed
“The Company has adequate resources to continue in operational existence for a period of at least until 31 August 2026, and no material uncertainties related to going concern have been identified. The Directors therefore continue to prepare the accounts on a going concern basis.”
Significant events
- “Research and Development activities are undertaken in the year as Carbon continue to further gain new scientific and technical knowledge regarding our proprietary system - Graphene.”
Auditor, going-concern and subsidiary information is drawn from the narrative of the latest annual accounts. About these numbers
People
5 active · 8 resigned
| Name | Role | Appointed | Born | Nationality |
|---|---|---|---|---|
| BYRNE, Patrick Michael | Director | 2025-06-11 | Jan 1959 | British |
| FERRIER, Jacqueline Simone | Director | 2019-10-07 | Mar 1977 | British |
| LAIDLAW, Ben Alistair Hunter, Mr | Director | 2021-07-14 | Aug 1991 | British |
| PORACCHIA, Alexandre Christophe | Director | 2025-06-05 | Oct 1974 | British |
| WATSON, Michael Clive | Director | 2025-06-06 | Jun 1954 | British |
Show 8 resigned officers
| Name | Role | Appointed | Resigned |
|---|---|---|---|
| DAVIES MGA SERVICES LIMITED | Corporate Secretary | 2018-03-23 | 2024-11-08 |
| ATKIN, Charles Neville Rupert | Director | 2023-10-27 | 2024-12-31 |
| BUTCHER, Christopher Stewart | Director | 2024-01-24 | 2025-12-31 |
| CARD, Stephen | Director | 2018-03-02 | 2023-07-14 |
| CARNAFFAN, Neil William | Director | 2018-02-07 | 2024-01-24 |
| LAWRENCE-BROWNE, Charles Andrew | Director | 2018-03-02 | 2018-08-08 |
| POGGIO, Mauro | Director | 2018-12-03 | 2020-07-13 |
| TYE, Nicholas George | Director | 2019-10-11 | 2025-11-06 |
Ownership
Persons with significant control
| Name | Kind | Nature of control | Notified | Status |
|---|---|---|---|---|
| Carbon Underwriting Holdings Limited | Corporate entity | Shares 75–100%, Voting 75–100%, Appoints directors | 2022-06-24 | Active |
| Mr Stephen Card | Individual | Significant influence | 2018-05-08 | Ceased 2020-03-02 |
| Ambant Underwriting Services Limited | Corporate entity | Shares 75–100%, Voting 75–100%, Appoints directors | 2018-02-07 | Ceased 2018-05-08 |
Filing timeline
Last 20 of 98 total filings
| Date | Type | Category | Description | |
|---|---|---|---|---|
| 2026-01-08 | TM01 | officers | Termination director company with name termination date | |
| 2025-11-17 | TM01 | officers | Termination director company with name termination date | |
| 2025-09-23 | AA | accounts | Accounts with accounts type full | |
| 2025-08-28 | CS01 | confirmation-statement | Confirmation statement with no updates | |
| 2025-06-12 | AP01 | officers | Appoint person director company with name date | |
| 2025-06-12 | AP01 | officers | Appoint person director company with name date | |
| 2025-06-12 | AP01 | officers | Appoint person director company with name date | |
| 2025-02-07 | AD03 | address | Move registers to sail company with new address | |
| 2025-02-06 | AD02 | address | Change sail address company with new address | |
| 2025-02-04 | AD01 | address | Change registered office address company with date old address new address | |
| 2025-01-07 | TM01 | officers | Termination director company with name termination date | |
| 2024-11-15 | TM02 | officers | Termination secretary company with name termination date | |
| 2024-10-05 | AA | accounts | Accounts with accounts type full | |
| 2024-09-04 | CS01 | confirmation-statement | Confirmation statement with no updates | |
| 2024-06-19 | MR01 | mortgage | Mortgage create with deed with charge number charge creation date | |
| 2024-01-30 | TM01 | officers | Termination director company with name termination date | |
| 2024-01-29 | AP01 | officers | Appoint person director company with name date | |
| 2023-12-04 | AP01 | officers | Appoint person director company with name date | |
| 2023-08-30 | CS01 | confirmation-statement | Confirmation statement with no updates | |
| 2023-08-09 | PSC05 | persons-with-significant-control | Change to a person with significant control |
Public-record activity
Raw counts from Companies House — last 12–24 months
- Filings
- 7
- Capital events
- 0
- Officers appointed
- 3
- Officers resigned
- 2
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.