Many thanks for this. My father, a Sergeant Observer, was in a Blenheim Mk I of 57 Squadron, Serial No L1325, on 7 November 1939, on a reconnaissance sortie from Metz. The aircraft was shot down near Mainz/Opladen by Leutnant (later Major) Muncheberg in an Me109, his first victory of 135 (!) according to some sources. My father, and the other two crew members, survived as POWs. The crew that flew the same mission the day before, to survey the 'Siegfried Line', were killed in action. The squadron commander Wing Commander 'Wings ' Day had been shot down the month before.
Staying in the RAF until 1961, retiring as an engineer Warrant Officer, my father died in 1993 at the age of 82. Last year I was pleased to claim and receive the Bomber Command Clasp on his behalf. Like many others of his time, he said very little of his wartime experiences but if anything the family's pride increases with the years.