Coast of Normandy Diadem served on the Arctic convoys and covered carrier raids against the German battleship Tirpitz in the early months of 1944, then became part of Force G off Juno Beach during the invasion of Normandy in June.
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.
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