Queen attends lunch at Downing Street – in pictures

Last-minute preparations as a policeman holds the ladder for a cleaner dusting the light above No 10's front door Photograph: Luke Macgregor/Reuters

David and Samantha Cameron welcome the Queen and Prince Philip at Downing Street Photograph: Oli Scarff/Getty Images

Samantha Cameron and the Queen on the steps of No 10 Photograph: Carl Court/AFP/Getty Images

Tony Blair arrives Photograph: Oli Scarff/Getty Images

Gordon Brown with his wife, Sarah Photograph: Leon Neal/AFP/Getty Images

Samantha Cameron greets Gordon Brown at No 10 Photograph: Tim Rooke/Rex Features

Larry the Downing Street cat looks out of a window Photograph: Kirsty Wigglesworth/AP

The Camerons greet Sir John and Lady Major Photograph: Facundo Arrizabalaga/EPA

Sir John Major, Tony Blair and Gordon Brown inside No 10 Photograph: Stefan Rousseau/PA

The Queen poses with the present and past prime ministers Photograph: Stefan Rousseau/AP

The Queen leaves No 10 after lunch
Photograph: Oli Scarff/Getty Images