Live coverage from St Paul's Cathedral as the Queen, the Duke of Edinburgh and senior cabinet ministers join a congregation of 2,000 for an act of thanksgiving and commitment.
The service, also broadcast on Radio 4, includes Sir Peter Maxwell Davies's new setting of the Jubilate Deo, readings by Patricia Hodge, Richard Griffiths and Booker Prize-winner Ben Okri, and a 250-voice children's choir. Ed Stourton sets the scene. TV presentation Steven Benson