Cabinet Secretary
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| Cabinet Secretary Head of the Home Civil Service | |
|---|---|
 | |
| Cabinet Office | |
| Style | Cabinet Secretary (informal) The Honourable (within the Empire) |
| Type | Chief Executive Officer |
| Status | Civil Servant |
| Reports to | Prime Minister |
| Seat | 70 Whitehall |
| Nominator | Prime Minister |
| Appointer | The Sovereign (on the advice of the Prime Minister and confidence of the House of Lords) |
| Term length | Six months |
| Formation | 30 March 2025 |
| Website | Cabinet Office |
The Cabinet Secretary is the most senior civil servant in the Empire of Great Britain and is based in the Cabinet Office. The person in this role acts as the senior policy adviser to the Prime Minister and Cabinet, and as the secretary to the Cabinet, is responsible to all ministers for the efficient running of government. To that effect, they are the Head and Chief Executive of the Civil Service. They are appointed by the Sovereign with the confidence of the House of Lords on the advice of the Prime Minister and are invited to attend Cabinet.
The current Cabinet Secretary is Prince Thomas, Duke of Devonshire, who has served since 4 March 2026.
Cabinet Secretaries
| Portrait | Cabinet Secretary | Term of Office | Government | |||
|---|---|---|---|---|---|---|
| Start | End | Duration | ||||
|
Horatio Nelson The Earl of Merioneth |
30 March 2025 | 2 June 2025 | 65 days | Kirkwall Premiership | |
| Second Warwick Premiership | ||||||
|
Sirch Somerset The Duke of York |
2 June 2025 | 2 October 2025 | 123 days | Second Warwick Premiership | |
| Dorchester Premiership | ||||||
| Marloes Premiership | ||||||
| Bedford Premiership | ||||||
|
Philip Somerset | 2 October 2025 | 23 November 2025 | 53 days | Bedford Premiership | |
| 2nd Strathmore Premiership | ||||||
| 17 December 2025 | 28 February 2026 | 74 days | Thomond Premiership | |||
|
Thomas Carew Somerset The Duke of Devonshire |
4 March 2026 | Present | 22 days | P. Somerset Premiership | |