Amentum Clean Energy International Limited

ActiveAccounts overdue 03260477 Private limited company

Incorporated: 8 October 1996 (30 years)
Previously known as: Jacobs Clean Energy International Limited (until 30 September 2024)
Amec Foster Wheeler Nuclear International Limited (until 18 March 2020)
Amec Nuclear International Limited (until 16 December 2014)
Earlier: NNC Limited, Technica Limited, United Decommissioning Technologies Limited, Leaders in Business Limited
Industry: Engineering related scientific and technical consulting activities (71122)
Technical testing and analysis (71200)
Directors: Martin Warwick Shaw
Loren Michael Jones
Owned by: Amentum Clean Energy Limited
Accounts type: Full
Region: North West
Address: 305 Bridgewater Place
Birchwood Park
Warrington
WA3 6XF

Filing status

Accounts due: 30 September 2026 (overdue)
Last accounts: 27 September 2024
Conf. stmt due: 22 October 2027
Last conf. stmt: 8 October 2026

Late accounts bring an automatic penalty and can get a company struck off.

Officers 3 active

Officer details are public data from the Companies House register.

Shaw, Martin Warwick

Director · Appointed 14 April 2026

Also at Amentum International Nuclear Services Limited, Amentum Enterprise Asset Solutions Construction Limited, Cavendish Dounreay Partnership Limited · more companies

British

Born September 1967 (59)

Jones, Loren Michael

Director · Appointed 1 October 2025

Also at Amentum Facility Management UK Ltd., National Nuclear Corporation Limited, Amentum (UK) Ltd. · more companies

British

Born March 1984 (42)

Prentice, Joshua David

Secretary · Appointed 1 June 2024

Officer history (29 former)

15 April 2026

Resigned Lyons, Ellen as Director

14 April 2026

Appointed Shaw, Martin Warwick as Director

13 April 2026

Resigned Carter, Roy Barrie as Director

1 October 2025

Appointed Jones, Loren Michael as Director

30 September 2025

Resigned White, Andrew John as Director

1 June 2024

Appointed Prentice, Joshua David as Secretary

1 June 2024

Resigned Roberts, Geoffrey as Secretary

21 August 2023

Resigned Holman, Rhona Mary as Secretary

21 August 2023

Appointed Roberts, Geoffrey as Secretary

10 February 2023

Resigned Chaudhary, Tejender Singh, Mr as Secretary

10 February 2023

Appointed Holman, Rhona Mary as Secretary

9 December 2020

Resigned Edwards, Sion Erwyd as Director

30 November 2020

Appointed Carter, Roy Barrie as Director

26 June 2020

Appointed Chaudhary, Tejender Singh, Mr as Secretary

6 March 2020

Resigned Jones, Iain Angus as Secretary

12 August 2019

Appointed Edwards, Sion Erwyd as Director

25 July 2019

Resigned Wood, Paul David as Director

2 May 2019

Appointed Jones, Iain Angus as Secretary

8 March 2019

Resigned Thomas, Anthony Mark as Secretary

16 February 2018

Appointed Thomas, Anthony Mark as Secretary

16 February 2018

Resigned Warburton, Jennifer Ann as Secretary

30 November 2016

Resigned Inns, Terry Peter Frank as Director

30 November 2016

Appointed Wood, Paul David as Director

31 October 2016

Resigned Jones, Thomas Leslie as Director

22 July 2016

Appointed Warburton, Jennifer Ann as Secretary

22 July 2016

Resigned Fidler, Christopher Laskey as Secretary

21 January 2016

Appointed Lyons, Ellen as Director

21 January 2016

Resigned Isles, Rachael as Director

18 May 2015

Appointed Inns, Terry Peter Frank as Director

31 March 2014

Appointed White, Andrew John as Director

31 March 2014

Resigned Davin, Julie as Director

31 March 2014

Appointed Isles, Rachael as Director

31 March 2014

Resigned Clarkson, Iain Geoffrey as Director

31 March 2014

Appointed Jones, Thomas Leslie as Director

2 July 2012

Appointed Davin, Julie as Director

2 July 2012

Resigned Smith, Kevin as Director

16 June 2009

Appointed Fidler, Christopher Laskey as Secretary

16 June 2009

Resigned Fellowes, Colin as Secretary

1 February 2008

Appointed Clarkson, Iain Geoffrey as Director

31 January 2008

Resigned Sadler, Steve as Director

21 May 2007

Appointed Smith, Kevin as Director

9 March 2007

Resigned Higton, Peter Desmond as Director

1 April 2006

Appointed Fellowes, Colin as Secretary

1 April 2006

Resigned Don Carolis, Frazer Anthony as Secretary

1 October 2005

Appointed Sadler, Steve as Director

30 September 2005

Resigned Lanigan, Philip Nicholas as Director

27 January 2005

Resigned Kershaw, Paul Richard as Director

1 January 2005

Appointed Higton, Peter Desmond as Director

1 November 1999

Appointed Lanigan, Philip Nicholas as Director

6 September 1999

Resigned Marlor, John Stanley as Director

30 June 1999

Resigned Ashman, Fraser Lionel as Director

11 May 1998

Resigned Durston, John Graham as Director

11 May 1998

Appointed Kershaw, Paul Richard as Director

15 November 1996

Appointed Ashman, Fraser Lionel as Director

15 November 1996

Appointed Marlor, John Stanley as Director

15 November 1996

Appointed Durston, John Graham as Director

15 November 1996

Appointed Don Carolis, Frazer Anthony as Secretary

14 November 1996

Resigned Rm Registrars Limited as Corporate Nominee Secretary

14 November 1996

Resigned Rm Nominees Limited as Corporate Nominee Director

8 October 1996

Appointed Rm Registrars Limited as Corporate Nominee Secretary

8 October 1996

Appointed Rm Nominees Limited as Corporate Nominee Director

Ownership 1 active

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

Amentum Clean Energy Limited

Corporate entity · Notified 6 April 2016

Owns 75–100% of shares

Holds 75–100% of voting rights

Right to appoint and remove directors

Private Company Limited By Shares

Reg. no. 01120437

Group structure 14 companies

Ownership group derived from the Companies House PSC register

Energy, Security and Technology UK Limited

Amentum Clean Energy Limited Owns 75–100% of shares

Alkali Metal Processing Limited Owns 25–50% of shares

Amentum Clean Energy International Limited This company Owns 75–100% of shares

Fast Reactor Technology Limited Owns 50–75% of shares

PWR Power Projects Limited Owns 25–50% of shares

Amentum E&C Limited Owns 75–100% of shares

Amentum Enterprise Asset Solutions Construction Limited Owns 75–100% of shares

Amentum Enterprise Asset Solutions Limited Owns 75–100% of shares

Amentum International Nuclear Services Limited Owns 75–100% of shares

Cavendish Dounreay Partnership Limited Owns 25–50% of shares

Dounreay Site Restoration Limited Owns 75–100% of shares

Energy, Safety and Risk Consultants (UK) Limited Owns 75–100% of shares

National Nuclear Corporation Limited Owns 75–100% of shares

Filings 150

Date	Description	Made Up To
19 October 2026	Confirmation statement with no updates	8 October 2026
15 April 2026	Termination of appointment of a director
14 April 2026	Termination of appointment of a director
14 April 2026	Appointment of a director
3 April 2026	Full accounts	27 September 2024