Veterans and current RAF personnel have arrived at St Paul's Cathedral ahead of a service commemorating the 75th anniversary of the Battle of Britain.
One of those outside the famous London landmark ahead of today's ceremony was 94-year-old Eileen Younghusband, who helped track aircraft during the three-and-a-half month battle.
Younghusband was 18 when she joined the Women's Auxiliary Air Force, and detected the first of Hitler's V2 rockets as they fell on London.
Another veteran, former Hurricane pilot William Clark, was presented with the Africa Star outside the cathedral as he celebrated turning 95.
The service will be followed by an aerial display at Goodwood in Sussex, during which Prince Harry will fly a Spitfire to mark the anniversary.
Hundreds of veterans, service men and women, politicians and Royals gathered for a major event marking 75 years since the Battle of Britain.
Prince Harry will visit a memorial flypast today to mark the 75th anniversary of the RAF's victory in the Battle of Britain.