AMBULATORY SURGERY INTERNATIONAL LTD
Operating primarily under the OneWelbeck brand, the company is a London-based private healthcare provider specialising in outpatient diagnostics and day-case surgery.
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Cash
£51m
+2% highest in 3 filed years
Net assets
£109m
+25.2% highest in 3 filed years
Employees
436
+13.2% highest in 3 filed years
Profit before tax
£14m
+21.6% highest in 3 filed years
Net assets
3-year trend · vs Health Care median
Accounts
3-year trend · Δ = latest vs prior filed period · latest reflected 2025-12-31
| Metric | Trend | 2023-12-31 | 2024-12-31 | 2025-12-31 | Δ vs prior |
|---|---|---|---|---|---|
| Turnover | £71,358,323 | £85,156,196 | £95,440,653 | +12.1% | |
| Operating profit | £6,197,057 | £13,762,981 | £14,279,891 | +3.8% | |
| Profit before tax | £2,977,750 | £11,660,387 | £14,181,477 | +21.6% | |
| Net profit | -£481,785 | £7,167,254 | £25,163,929 | +251.1% | |
| Cash | £18,120,029 | £49,635,554 | £50,640,326 | +2% | |
| Total assets less current liabilities | £74,953,471 | £115,686,450 | £143,758,398 | +24.3% | |
| Net assets | £38,981,636 | £87,062,501 | £108,970,175 | +25.2% | |
| Equity | £38,981,636 | £87,062,501 | £108,970,175 | +25.2% | |
| Average employees | 332 | 385 | 436 | +13.2% | |
| Wages | £15,051,157 | £18,433,378 | £20,927,130 | +13.5% | |
| Directors' remuneration | £241,487 | £323,904 | £472,073 | +45.7% | |
| Directors' pension contributions | £697 | £4,059 | £5,168 | +27.3% | |
| Highest paid director | £241,487 | £323,904 | £449,934 | +38.9% |
Values shown as filed in the company's annual accounts. — indicates the figure wasn't present under that line item in that period. The Δ column is the change from the prior filed period as a percentage of |prior|; lines a company doesn't report show —. About these numbers
Ratios
Computed from the line items above — sparklines read oldest → newest
| Ratio | Trend | 2023-12-31 | 2024-12-31 | 2025-12-31 |
|---|---|---|---|---|
| Operating margin | 8.7% | 16.2% | 15.0% | |
| Net margin | -0.7% | 8.4% | 26.4% | |
| Return on capital employed | 8.3% | 11.9% | 9.9% | |
| Gearing (liabilities / total assets) | 58.3% | 33.9% | 32.6% | |
| Current ratio | 2.22x | 4.31x | 4.79x | |
| Interest cover | 1.92x | 4.47x | 7.62x |
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 1 time since incorporation
- AMBULATORY SURGERY INTERNATIONAL LTD 2015-11-30 → present
- AMSURGE INTERNATIONAL LTD 2015-11-16 → 2015-11-30
Audit & accounting basis
- Accounting basis
- FRS 102
- Reporting scope
- Consolidated group
- Auditor
- MHA
- Audit opinion
- Unqualified (clean)
- Going concern
- Affirmed
“In auditing the financial statements, we have concluded that the directors' use of the going concern basis of accounting in the preparation of the financial statements is appropriate. Based on the work we have performed, we have not identified any material uncertainties relating to events or conditions that, individually or collectively, may cast significant doubt on the Group's or the parent Company's ability to continue as a going concern for a period of at least twelve months from when the financial statements are authorised for issue.”
Group structure
- AMBULATORY SURGERY INTERNATIONAL LTD · parent
- ASI Welbeck Holdings Limited 100%
- Welbeck Health AFI Limited 100%
- ASI Oxford Holdings Limited 100%
- ASI Cambridge Holdings Limited 100%
- ASI London S Limited 100%
- Welbeck Health Partners Management UK Limited 100%
- ASI Edinburgh Holdings Limited 100%
- ASI Hampshire Holdings Limited 100%
- ASI London P Limited 100%
- ASI London H Limited 51%
- ASI London I Holdings Limited 100%
- ASI London I Limited 51%
- ASI London J Holdings Limited 100%
- ASI London J Limited 51%
- ASI Oxford A Holdings Limited 100%
- ASI Oxford A Limited 51%
- ASI Cambridge A Holdings Limited 100%
- ASI Cambridge A Limited 51%
- ASI London K LLP 100%
- ASI Edinburgh A Holdings Limited 100%
- ASI Edinburgh A Limited 51%
- ASI Hampshire A Holdings Limited 100%
- ASI Hampshire A Limited 51%
Significant events
- “The Group put in place a £20 million revolving credit facility to enhance its financial flexibility.”
Auditor, going-concern and subsidiary information is drawn from the narrative of the latest annual accounts. About these numbers
People
8 active · 4 resigned
| Name | Role | Appointed | Born | Nationality |
|---|---|---|---|---|
| CHADWICK-JONES, Andrew Knighton | Director | 2026-02-21 | Jan 1972 | British |
| FORD, William | Director | 2024-06-03 | Sep 1983 | Dutch |
| HARPER, Peter George, Dr | Director | 2026-03-31 | Aug 1945 | British |
| JACOBSON, Mark Richard | Director | 2024-06-03 | Dec 1962 | British |
| MANNING, David Lynn | Director | 2015-11-16 | Aug 1949 | American |
| SCHILLING, Richard John, Professor | Director | 2024-11-08 | May 1966 | British |
| VERZHBITSKIY, Pavel Valentinovich | Director | 2022-09-29 | Jan 1973 | British |
| WHITE, Giles Alistair | Director | 2021-04-21 | Jul 1975 | British |
Show 4 resigned officers
| Name | Role | Appointed | Resigned |
|---|---|---|---|
| STANBRIDGE, Raymond John, Dr | Secretary | 2015-11-30 | 2018-03-05 |
| CHADWICK-JONES, Andrew Knighton | Director | 2017-07-03 | 2026-02-20 |
| FIENNES, Ivo Twisleton Wykeham | Director | 2017-10-23 | 2021-04-21 |
| HARPER, Peter George, Dr | Director | 2015-11-16 | 2016-01-21 |
Ownership
Persons with significant control
| Name | Kind | Nature of control | Notified | Status |
|---|---|---|---|---|
| Mr David Lynn Manning | Individual | Significant influence | 2016-11-01 | Ceased 2023-01-18 |
Filing timeline
Last 20 of 106 total filings
Material constitutional events — rename, articles re-file, resolution
- 2025-02-10 MA Memorandum articles
| Date | Type | Category | Description | |
|---|---|---|---|---|
| 2026-08-27 | AA | accounts | Accounts with accounts type group | |
| 2026-06-02 | AP01 | officers | Appoint person director company with name date | |
| 2026-03-23 | CS01 | confirmation-statement | Confirmation statement with updates | |
| 2026-03-23 | TM01 | officers | Termination director company with name termination date | |
| 2026-03-18 | AP01 | officers | Appoint person director company with name date | |
| 2026-03-02 | SH01 | capital | Capital allotment shares | |
| 2026-03-02 | SH01 | capital | Capital allotment shares | |
| 2025-10-03 | AA | accounts | Accounts with accounts type group | |
| 2025-06-03 | SH01 | capital | Capital allotment shares | |
| 2025-04-01 | SH01 | capital | Capital allotment shares | |
| 2025-03-20 | MR01 | mortgage | Mortgage create with deed with charge number charge creation date | |
| 2025-03-11 | RP04CS01 | confirmation-statement | Second filing of confirmation statement with made up date | |
| 2025-03-10 | SH01 | capital | Capital allotment shares | |
| 2025-03-05 | CS01 | confirmation-statement | Confirmation statement with updates | |
| 2025-02-28 | AP01 | officers | Appoint person director company with name date | |
| 2025-02-10 | MA | incorporation | Memorandum articles | |
| 2025-01-14 | SH01 | capital | Capital allotment shares | |
| 2024-10-25 | SH01 | capital | Capital allotment shares | |
| 2024-10-15 | MR04 | mortgage | Mortgage satisfy charge full | |
| 2024-09-03 | SH01 | capital | Capital allotment shares |
Public-record activity
Raw counts from Companies House — last 12–24 months
- Filings
- 8
- Capital events
- 8
- Officers appointed
- 2
- 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.