It's 70 years today since the D-Day invasions at Normandy, and all day the BBC will mark the occasion with a special show live from the small coastal town of Arromanches in Normandy. Senior members of the royal family and foreign dignitaries join thousands of veterans at the Bayeux War Cemetery for a service, held alongside the 4,000 gravestones of the British soldiers, sailors and airmen who lost their lives in the campaign. Sian Williams and Dan Snow report live from the town, where the Prince of Wales will be among those paying tribute.