Deputy Prime Minister of the United Kingdom

United Kingdom Deputy Prime Minister of the United Kingdom of Great Britain and Northern Ireland
Royal arms of His Majesty's Government
Incumbent David Lammy since 5 September 2025
Government of the United Kingdom Cabinet Office
Style	Deputy Prime Minister (informal) The Right Honourable (within the UK and Commonwealth) His Excellency (diplomatic)
Type	Minister of the Crown
Member of	Cabinet Privy Council National Security Council Council of the Nations and Regions Mayoral Council for England
Reports to	The Prime Minister
Residence	None, may use grace and favour residences
Seat	Westminster
Formation	1947
First holder	Clement Attlee (De facto)
Website	gov.uk/government/ministers/deputy-prime-minister--3

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The deputy prime minister of the United Kingdom is an honorific title given to a minister of the Crown and a member of the British Cabinet, normally to signify a very senior minister, the deputy leader of the governing party, or a key political ally of the prime minister.

It does not entail any specific legal or constitutional responsibilities, though the holder will normally be assigned some duties by the prime minister and in recent times this has typically always included deputising for the prime minister in the House of Commons, domestically and abroad. Appointment to the position is usually paired with appointment to a departmental secretary of state position. The title is not always in use and prime ministers have been known to appoint deputies with title first secretary of state or informal deputies without any honorific title.

The incumbent Deputy Prime Minister is David Lammy who has served under Keir Starmer since 5 September 2025. Lammy succeeded Starmer's first deputy, Angela Rayner, in a cabinet reshuffle following her resignation due to her involvement in a tax scandal.