David Cameron told Britain's D-Day veterans the country would "always be proud" of them.
The Prime Minister joined D-Day veterans on warship HMS Belfast for a ceremony to mark the 70th anniversary of the Normandy Landings. The ship, which is moored on the River Thames, led 70th anniversary D-Day commemorations with a formal ceremony for veterans who served on it during the assault.
HMS Belfast will play its part in commemorating the 70th anniversary of D-Day today by hosting a formal ceremony for veterans.
There will also be a fly-past over the River Thames.
On St Patricks Day in 1938 HMS Belfast was launched and the Royal Navy Ship has been moored on the River Thames since the 1970s.
To celebrate its 75th year, there has been a special ceremony on the cruiser. Glen Goodman was there for today's birthday bash.
The S.A. Agulhas ship left Wood Wharf in Isle of dogs at 2pm and it will arrive near HMS Belfast around 2.30pm today.
The Coldest Journey's ice-strengthened expedition ship, the SA Agulhas, is arriving this afternoon at approximately 3pm to moor alongside the HMS Belfast at London Bridge. She is big, red and has Seeing is Believing written along each side.
The Coldest Journey expedition, led by explorer Sir Ranulph Fiennes, aims to complete the first ever transantarctic crossing during the polar winter, whilst raising money for Seeing is Believing, a charity tackling blindness.
The ship will be moored at London Bridge until 6 December, when she departs destined for South Africa where she will be met by Sir Ranulph Fiennes.
Veterans from the D-Day landings are being hosted at a lunch on board HMS Belfast today.
The ship has only recently been re-opened to the public after the gangway collapsed into the River Thames in November 2011.
D Day Veterans from Hillingdon are piped aboard HMS Belfast on the 68th anniversary of the Normandy Landings.
They are attending a special lunch on board the ship.