What Sizewell C say about themselves
“Reliable low-carbon power for 6 million homes. We will work with over 2,000 UK businesses and support 70,000 UK jobs during construction.”
Sizewell C Limited
- Incorporated
- 28 October 2014 (12 years)
- Previously known as
- NNB Generation Company (SZC) Ltd (until 12 June 2023)
- Industry
- Production of electricity (35110)
- Directors
- Caroline Botwood
- Owned by
- Accounts type
- Full
- Region
- Greater London
- Address
- 25 Copthall AvenueLondonEC2R 7BP
Website & contact details
- Website
Filing status
- Accounts due
- 31 December 2027
- Last accounts
- 31 March 2026
- Conf. stmt due
- 1 June 2027
- Last conf. stmt
- 18 May 2026
Charges
- Total
- 5
- Outstanding
- 3
- Part satisfied
- 0
- Satisfied
- 2
Officers 14 active
Officer details are public data from the Companies House register.
Director · Appointed 3 November 2026
Also at Innovative Ash Solutions Ltd · more companies
British
Born June 1978 (48)
Director · Appointed 23 March 2026
Also at Endeavour Mining PLC · more companies
British
Born July 1965 (61)
Botwood, Caroline
Director · Appointed 16 February 2026
British
Born October 1965 (61)
Director · Appointed 4 November 2025
Irish
Born September 1971 (55)
Lopez Delgado, Alejandro
Director · Appointed 4 November 2025
Spanish,British
Born November 1977
Director · Appointed 1 October 2025
British
Born June 1958 (68)
British
Born March 1965 (61)
Magnus, Asha
Secretary · Appointed 25 June 2024
Director · Appointed 1 January 2024
British
Born September 1965 (61)
Thornton, Julie
Director · Appointed 1 January 2024
British
Born January 1963 (63)
Silvennoinen, Jouni Sakari
Director · Appointed 31 July 2023
Finnish
Born December 1961 (64)
Director · Appointed 3 April 2023
British
Born June 1964 (62)
Golshan, Mina, Dr
Director · Appointed 29 November 2022
British
Born June 1974 (52)
Director · Appointed 15 November 2017
British
Born February 1965 (61)
Officer history (32 former)
3 November 2026
2 November 2026
23 March 2026
16 February 2026
Appointed Botwood, Caroline as Director
16 February 2026
Resigned Loveday, Jonathan Bruce as Director
31 December 2025
Resigned Pyke, Julia as Director
4 November 2025
4 November 2025
Appointed Lopez Delgado, Alejandro as Director
4 November 2025
Resigned Michoud, Bertrand as Director
31 October 2025
Resigned Noble, Richard Grant as Director
17 October 2025
16 October 2025
1 October 2025
24 March 2025
Appointed Loveday, Jonathan Bruce as Director
24 March 2025
Resigned Smallwood, Nick as Director
1 March 2025
1 February 2025
1 November 2024
7 October 2024
7 October 2024
25 June 2024
Resigned Pokorny, Abbie as Secretary
25 June 2024
Appointed Magnus, Asha as Secretary
1 January 2024
1 January 2024
Appointed Thornton, Julie as Director
31 July 2023
Appointed Noble, Richard Grant as Director
31 July 2023
31 July 2023
Appointed Silvennoinen, Jouni Sakari as Director
30 May 2023
Appointed Smallwood, Nick as Director
30 May 2023
3 April 2023
3 April 2023
1 December 2022
29 November 2022
29 November 2022
29 November 2022
29 November 2022
Appointed Golshan, Mina, Dr as Director
29 November 2022
29 November 2022
Resigned Billingham, Stephen Robert, Dr as Director
30 June 2022
Appointed Billingham, Stephen Robert, Dr as Director
30 June 2022
1 February 2022
Resigned Gooding, Claire Rachel as Secretary
1 February 2022
1 February 2022
Appointed Pokorny, Abbie as Secretary
1 February 2022
15 December 2021
30 November 2021
1 March 2021
1 March 2021
1 November 2019
Appointed Michoud, Bertrand as Director
31 October 2019
3 April 2019
Appointed Gooding, Claire Rachel as Secretary
3 April 2019
Appointed Pyke, Julia as Director
3 April 2019
3 April 2019
3 April 2019
Resigned Pyke, Julia as Secretary
6 June 2018
6 June 2018
15 November 2017
15 November 2017
15 November 2017
15 November 2017
26 July 2017
Appointed Pyke, Julia as Secretary
26 July 2017
Resigned Hamill, Christopher Hugh as Secretary
30 September 2016
30 September 2016
30 September 2016
30 September 2016
30 September 2016
30 September 2016
30 September 2016
17 November 2014
17 November 2014
Appointed Hamill, Christopher Hugh as Secretary
17 November 2014
17 November 2014
17 November 2014
17 November 2014
Resigned Peregrine Secretarial Services Ltd as Corporate Director
28 October 2014
28 October 2014
Appointed Peregrine Secretarial Services Ltd as Corporate Director
Ownership 3 active
People and entities with significant control, from the Companies House PSC register
Corporate entity · Notified 4 November 2025
Has significant influence or control
Limited Company
Reg. no. 09284751
Corporate entity · Notified 4 November 2025
Has significant influence or control
Limited Company
Reg. no. 06930266
Corporate entity · Notified 17 September 2025
Owns 75–100% of shares
Holds 75–100% of voting rights
Limited Company
Reg. no. 16480404
Former controllers (1)
17 September 2025
Ceased Sizewell C (Holding) Limited — Owns 75–100% of shares
Group structure 4 companies
Ownership group derived from the Companies House PSC register
Sizewell C (Pledgeco) Limited Owns 75–100% of shares
Sizewell C Limited This company Has significant influence or control
Nuclear Services (Technical) Company Limited Owns 25–50% of shares
Filings 139
| Date | Description | Made Up To | Pages | |
|---|---|---|---|---|
| 6 November 2026 | Termination of appointment of a director | |||
| 3 November 2026 | Appointment of a director | |||
| 15 October 2026 | Full accounts | 31 March 2026 | ||
| 29 May 2026 | Confirmation statement with updates | 18 May 2026 | ||
| 27 March 2026 | Appointment of a director |
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