Harwell Dosimeters Limited

Active02917906 Private limited company

Incorporated: 12 April 1994 (32 years)
Industry: Manufacture of other plastic products (22290)
Directors: Karen Louise Burton
Kenneth Kohler
Owned by: Synergy Health Holdings Limited
Accounts type: Full
Region: South East
Address: 2200 Renaissance
Basing View
Basingstoke
RG21 4EQ

Filing status

Accounts due: 31 December 2026
Last accounts: 31 March 2025
Conf. stmt due: 23 October 2027
Last conf. stmt: 9 October 2026

Charges

Total: 5
Outstanding: 0
Part satisfied: 0
Satisfied: 5

Officers 2 active

Officer details are public data from the Companies House register.

Burton, Karen Louise

Director · Appointed 14 November 2025

Also at CLBV Limited, Albert Browne Limited, Medi-Cart International Limited · more companies

American

Born May 1967 (59)

Kohler, Kenneth

Director · Appointed 15 May 2025

American

Born June 1962 (64)

Officer history (15 former)

14 November 2025

Appointed Burton, Karen Louise as Director

14 November 2025

Resigned Tokich, Michael Joseph as Director

15 May 2025

Appointed Kohler, Kenneth as Director

23 April 2025

Resigned Eaton, Michael John as Director

7 May 2020

Resigned Rendle, Peter John as Director

25 September 2017

Appointed Rendle, Peter John as Director

25 September 2017

Resigned Turner, Jonathan Paul as Secretary

25 September 2017

Resigned Turner, Jonathan Paul as Director

3 July 2017

Appointed Eaton, Michael John as Director

3 July 2017

Appointed Tokich, Michael Joseph as Director

3 July 2017

Appointed Turner, Jonathan Paul as Director

3 July 2017

Resigned Pymer, David as Secretary

3 July 2017

Appointed Turner, Jonathan Paul as Secretary

3 July 2017

Resigned Tilling, Peter Thomas as Director

8 March 2011

Appointed Pymer, David as Secretary

8 March 2011

Resigned Young, Kirsty as Secretary

13 March 2006

Resigned Wsm Services Limited as Corporate Secretary

13 March 2006

Appointed Young, Kirsty as Secretary

21 January 2005

Appointed Tilling, Peter Thomas as Director

21 January 2005

Resigned Stebbing, Gavin Frederick Mark as Director

21 January 2005

Resigned Bett, Roger, Dr as Director

31 January 2004

Resigned Young, Trevor George as Director

31 January 2004

Resigned Groves, Christopher Mark as Director

27 August 1999

Appointed Young, Trevor George as Director

27 August 1999

Appointed Groves, Christopher Mark as Director

27 August 1999

Resigned Pearce, Harold James as Director

28 July 1999

Appointed Bett, Roger, Dr as Director

1 March 1995

Appointed Stebbing, Gavin Frederick Mark as Director

1 March 1995

Resigned Hatton, Christina Dorothy as Director

1 March 1995

Appointed Pearce, Harold James as Director

12 April 1994

Appointed Hatton, Christina Dorothy as Director

12 April 1994

Appointed Wsm Services Limited as Corporate Secretary

Ownership 1 active

People and entities with significant control, from the Companies House PSC register

Synergy Health Holdings Limited

Corporate entity · Notified 3 July 2017

Owns 75–100% of shares

Holds 75–100% of voting rights

Right to appoint and remove directors

Private Limited Company

Reg. no. 06047498

Former controllers (1)

3 July 2017

Ceased Peter Thomas Tilling — Owns 75–100% of shares

Group structure 23 shown

Ownership group derived from the Companies House PSC register

Steris Limited

Steris Dover Limited Owns 75–100% of shares

Cantel Medical (UK) Limited Owns 75–100% of shares

Medical Innovations Group Holdings Limited Owns 75–100% of shares

CLBV Limited Owns 75–100% of shares

HMM Holdco Limited Owns 75–100% of shares

Key Surgical Limited Owns 75–100% of shares

Ste UK Holdco Limited Owns 75–100% of shares

Ste UK Sub Holdco Limited Owns 75–100% of shares

Steris Dover Ast Holdings Limited Owns 75–100% of shares

Steris Dover Canada Holdings Limited Owns 75–100% of shares

Steris Solutions Limited Owns 75–100% of shares

Steris UK Holding Limited Owns 75–100% of shares

Eschmann Holdings Limited Owns 75–100% of shares

Steris CH Limited Owns 75–100% of shares

Synergy Health Limited Owns 75–100% of shares

Synergy Health Holdings Limited Owns 75–100% of shares

Harwell Dosimeters Limited This company Owns 75–100% of shares

Medisafe Holdings Ltd Owns 75–100% of shares

Shiloh Limited Owns 75–100% of shares

Synergy Health (UK) Limited Owns 75–100% of shares

Synergy Health Sterilisation UK Limited Owns 75–100% of shares

Synergy Health Systems Limited Owns 75–100% of shares

Financials

Balance sheet as at 31 March 2025 · full accounts

Net Assets: £3,476,715
Cash: £1,386,569
Profit Before Tax: £3,281,235
Employees: 21

Debt Ratio: 43%
Current Ratio: 2.0x
Return on Equity: 71%

Trend

Net Assets

Balance sheet detail

	2025	2024	2023
Fixed Assets	£1,238,360	£992,047	£938,890
Current Assets	£4,846,559	£4,638,072	£4,581,354
Debtors	£1,596,832	£1,288,428	£1,720,976
Cash	£1,386,569	£2,250,944	£2,320,403
Creditors (< 1 year)	£2,421,125	£1,693,510	£1,090,033
Net Current Assets	£2,425,434	£2,944,562	£3,491,321
Net Assets	£3,476,715	£3,816,113	£4,264,570
Shareholder Funds	£3,476,715	£3,816,113	£4,264,570

Filings 143

Date	Description	Made Up To
9 October 2026	Confirmation statement with no updates	9 October 2026
23 September 2026	Register inspection address has been changed
27 August 2026	Director's details changed
17 November 2025	Termination of appointment of a director
17 November 2025	Appointment of a director