Website & contact details
- Group website
- The site of this company’s group or brand.
William Cook Machining Limited
- Incorporated
- 25 September 2015 (11 years)
- Previously known as
- Cook Rail Systems Limited (until 17 April 2026)This list may be incomplete. See all names on Companies House
- Industry
- Machining (25620)
- Directors
- Andrew John Cook
- Owned by
- Accounts type
- Micro entity
- Region
- Yorkshire
- Address
- C/o William Cook Holdings LimitedParkway AvenueSheffieldS9 4UL
Filing status
- Accounts due
- 30 June 2027
- Last accounts
- 30 September 2025
- Conf. stmt due
- 8 October 2027
- Last conf. stmt
- 24 September 2026
Officers
This list may be incomplete. See all officers on Companies House
Officer details are public data from the Companies House register.
Cook, Andrew John, Sir
Director · Appointed 4 November 2026
British
Born October 1949 (77)
Director · Appointed 9 September 2026
Also at A D A Machining Services Limited
British
Born May 1974 (52)
Ownership 1 active
People and entities with significant control, from the Companies House PSC register
Corporate entity · Notified 6 April 2016
Owns 75–100% of shares
Holds 75–100% of voting rights
Right to appoint and remove directors
Has significant influence or control
Private Limited Company
Reg. no. 03283010
Group structure 19 companies
Ownership group derived from the Companies House PSC register
William Cook Holdings Limited Owns 50–75% of shares (as a trust)
William Cook Aviation Limited Owns 75–100% of shares
William Cook Cast Products Limited Owns 75–100% of shares
A D A Machining Services Limited Owns 75–100% of shares
Chesterfield Metal Technologies Limited Owns 75–100% of shares
Cook Precision Ceramic Castings Limited Owns 75–100% of shares
Simpson Patterns Limited Holds 75–100% of voting rights
William Cook Defence Limited Owns 75–100% of shares
William Cook Leeds Limited Owns 75–100% of shares
William Cook Estates Limited Owns 75–100% of shares
William Cook Leaseholds Limited Owns 75–100% of shares
William Cook Limited Owns 75–100% of shares
William Cook Machining Limited This company Owns 75–100% of shares
William Cook Properties Limited Owns 75–100% of shares
William Cook Publishing Limited Owns 75–100% of shares
William Cook Rail Limited Owns 75–100% of shares
Crowle Wharf Engineers Limited Owns 75–100% of shares
Financials
Balance sheet as at 30 September 2025 · micro entity accounts
- Net Assets
- £1
Trend
Net Assets
Balance sheet detail
| 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | |
|---|---|---|---|---|---|---|---|
| Current Assets | £1 | ||||||
| Cash | £1 | £1 | £1 | £1 | £1 | £1 | |
| Net Current Assets | £1 | ||||||
| Net Assets | £1 | £1 | £1 | £1 | £1 | £1 | £1 |
| Shareholder Funds | £1 | £1 | £1 | £1 | £1 | £1 | £1 |
Filings
Recent filings only. See the full history on Companies House
| Date | Description | Made Up To | Pages | |
|---|---|---|---|---|
| 4 November 2026 | Appointment of a director | |||
| 9 September 2026 | Appointment of a director | |||
| 17 April 2026 | Certificate of change of name | |||
| 16 April 2026 | Appointment of a director | |||
| 16 April 2026 | Termination of appointment of a director |
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