Newly-elected Labour leader Jeremy Corbyn has arrived for his first official engagement at the Battle of Britain memorial service at St Paul's Cathedral.
He was wearing a tie and was accompanied by his deputy Tom Watson.
There had been suggestions Mr Corbyn wasn't keen to attend but it seems such concerns were unfounded.
In a statement released to mark the ceremony, Mr Corbyn praised those who had helped Britain and the allies defeat the Nazis.
My mum served as an air raid warden and my dad in the Home Guard.
Like that whole generation, they showed tremendous courage and determination to defeat fascism. The heroism of the Royal Air Force in the Battle of Britain is something to which we all owe an enormous debt of gratitude.
The loss of life - both civilian and military - should be commemorated so that we both honour their lives and do all that we can to ensure future generations are spared the horrors of war.
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.