EUROREGISTRY
GB · Person with significant control
Cormac James Byrne
Cormac James Byrne is recorded on the Companies House register of people with significant control for 12 UK companies.
Register details
Facts
- Name on the register
- Mr Cormac James Byrne
- Type
- Individual
- Nationality
- Irish
- Country of residence
- England
- Year of birth
- 1951
- Significant control now
- 12 UK companies
- Earlier significant control
- 1 UK company
- First notified
- 6 April 2016
- Source
- Companies House register of people with significant control, 20 September 2026
At a glance
Cormac James Byrne's companies
- Cormac James Byrne owns 75% or more of the shares in 3 of the 12 companies listed below.
- Main lines of business: development of building projects (3), activities of construction holding companies (1) and activities of other holding companies n.e.c. (1).
- Registered offices in London (11) and Rickmansworth (1).
- The companies were incorporated between 1939 and 2025.
- 2 of the companies also list other people or companies with significant control.
These details come from the register as published on 20 September 2026. The register can change at any time: check the current entry live before relying on it.
Companies
Significant control now
UK companies that list Cormac James Byrne as a person with significant control, with the nature of that control as registered.
| Company | Status | Incorporated | Town | Business | Nature of control | Since |
|---|---|---|---|---|---|---|
| ARDMORE NEW PROJECTS LIMITED 16616328 · Private Limited Company | Active | 30 July 2025 | Rickmansworth | Activities of construction holding companies | Owns 75% or more of the shares; Holds 75% or more of the voting rights; Can appoint or remove a majority of the board of directors | 30 July 2025 |
| ARDMORE GROUP HOLDINGS LTD 15806745 · Private Limited Company | Active | 27 June 2024 | London | Activities of other holding companies n.e.c. | Owns 75% or more of the shares; Holds 75% or more of the voting rights; Can appoint or remove a majority of the board of directors | 27 June 2024 |
| ARDMORE FIRST BASE PARTNERSHIP LIMITED 07030220 · Private Limited Company | Active - Proposal to Strike off | 25 September 2009 | London | Construction of domestic buildings | Has significant influence or control | 6 April 2016 |
| BRITISH CONTRACTORS PLANT LIMITED 00351354 · Private Limited Company | Active - Proposal to Strike off | 31 March 1939 | London | Other specialised construction activities n.e.c. | Has significant influence or control | 6 April 2016 |
| BYRNE ESTATES (CHATHAM) LIMITED 03254702 · Private Limited Company | Active | 20 September 1996 | London | Development of building projects | Owns more than 25% but not more than 50% of the shares, as a trustee of a trust; Holds more than 25% but not more than 50% of the voting rights, as a trustee of a trust; Has significant influence or control, as a trustee of a trust | 6 April 2016 |
| BYRNE ESTATES (KENSAL GREEN) LIMITED 05694449 · Private Limited Company | Active | 1 February 2006 | London | Buying and selling of own real estate | Owns 75% or more of the shares; Holds 75% or more of the voting rights | 6 April 2016 |
| BYRNE ESTATES LIMITED 05867839 · Private Limited Company | Active | 5 July 2006 | London | Development of building projects | Owns more than 25% but not more than 50% of the shares, as a trustee of a trust; Holds more than 25% but not more than 50% of the voting rights, as a trustee of a trust; Has significant influence or control, as a trustee of a trust | 6 April 2016 |
| BYRNE PROPERTIES LIMITED 02655319 · Private Limited Company | Active | 18 October 1991 | London | Development of building projects | Owns more than 25% but not more than 50% of the shares; Holds more than 25% but not more than 50% of the voting rights | 6 April 2016 |
| CELEBRATION HOMES LIMITED 03893064 · Private Limited Company | Active | 13 December 1999 | London | Other business support service activities n.e.c. | Has significant influence or control | 6 April 2016 |
| KENSAL GREEN MANAGEMENT COMPANY LIMITED 06417458 · Private Limited Company | Active | 5 November 2007 | London | Non-trading company non trading | Has significant influence or control | 6 April 2016 |
| PADDINGTON CONSTRUCTION LIMITED 01069492 · Private Limited Company | Active | 4 September 1972 | London | Construction of commercial buildings | Owns more than 25% but not more than 50% of the shares | 6 April 2016 |
| SYSTEMHAVEN LIMITED 04205376 · Private Limited Company | Active | 25 April 2001 | London | Other letting and operating of own or leased real estate | Owns more than 25% but not more than 50% of the shares; Holds 75% or more of the voting rights | 6 April 2016 |
History
Earlier significant control
Companies where Cormac James Byrne was registered as having significant control, and no longer is.
| Company | Nature of control | From | Until |
|---|---|---|---|
| ARDMORE GROUP LIMITED 10379475 · Private Limited Company | Owns more than 25% but not more than 50% of the shares; Holds more than 25% but not more than 50% of the voting rights | 16 September 2016 | 26 July 2024 |
Connections
Others with significant control of these companies
- Michael ByrneBYRNE ESTATES (CHATHAM) LIMITED
- Patrick ByrneBYRNE ESTATES (CHATHAM) LIMITED
Explained
What significant control means
Every UK company must keep a register of the people with significant control over it and file it with Companies House. Someone has significant control if they own more than 25% of the shares or voting rights, can appoint or remove a majority of the board, or otherwise have significant influence or control. Companies can also be controlled through another company, which then appears on the register itself.
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