My father was a flight sergeant in the RAF. He was in 2757 Squadron that arrived in Normandy on 21 August 1944. In his diary entry for 26 August he writes that he's been told he's joining R Force. Colonel Kay is in charge of his detachment, which includes one flight from 2717 Squadron. Question: How many people in a RAF flight? My father went into Rouen with R Force. On 31 August 1944 he record in his diary that he goes out with A.T.1 investigating flying bomb sites. When investigating another bomb site on 2 September 1944, he writes, "useful gen being picked up by A.T.1 people". Question: Who were A.T.1 people? He moves on to Brussels with R Force. He mentioned 8th Div Tanks being ahead of them. Question: 8th Div Tanks fits in where? I think my father was part of the 21st Army Group. Was 8th Div Tanks part of the 21st Army Group also? In his diary my father mentions working with 1315 M.W.H.Q. Question: Who/what were 1315 M.W.H.Q? Hope someone out there can answer my questions. My father Leonard was a lovely man, a very special father and grandfather. I found his war diary only very recently, among my mother's things after she died.