The weakest of the three British Bombarding Forces, "E", was that attached to Force "J". It consisted of the cruisers Belfast and Diadem, which were (rightly, as it proved) considered sufficient to deal with the weak batteries in the Canadian divisional sector. The only batteries actually scheduled for bombardment by Bombarding Force "E" before H Hour were those at Ver-sur-Mer and Beny-sur-Mer, which were duly engaged by Belfast and Diadem respectively, beginning at 5:30 and 5:52 a.m. The destroyer Kempenfelt fired at an inland battery midway between Courseulles and Bernieres at 6:19 a.m.
Coast of Normandy For the invasion of Normandy Belfast was made headquarters ship of Bombardment Force E flying the flag of Rear-Admiral Frederick Dalrymple-Hamilton, and was to support landings by British and Canadian forces in the Gold and Juno Beach sectors.
On 2 June Belfast left the River Clyde for her bombardment areas. That morning Prime Minister Winston Churchill had announced his intention to go to sea with the fleet and witness the invasion from HMS Belfast . This was opposed by the Supreme Allied Commander, General Dwight D. Eisenhower, and the First Sea Lord, Sir Andrew Cunningham. An intervention by the King eventually prevented Churchill from going.
The invasion was to begin on 5 June but bad weather forced a 24-hour delay. At 5:30 am on 6 June Belfast opened fire on a German artillery battery at Ver-sur-Mer, suppressing the guns until the site was overrun by British infantry of 7th Battalion, Green Howards.
On 12 June Belfast supported Canadian troops moving inland from Juno Beach and returned to Portsmouth on 16 June to replenish her ammunition. She returned two days later for further bombardments. On the night of 6 July Belfast was threatened at anchor by German motor torpedo boats ('E-boats'). She evaded them by weighing anchor and moving to the concealment of a smokescreen. Belfast fired her last round in anger in European waters on 8 July, in company with the monitor HMS Roberts and the battleship HMS Rodney, as part of Operation Charnwood. On 10 July she sailed for Scapa, the fighting in France having moved beyond the range of her guns. During her five weeks off Normandy Belfast had fired some 1996 rounds from her six-inch guns