F8+KR III/KG40

[Oxby R]

Gentlemen - would appreciate some assistance with KG40 query. I am trying to establish accuracy regarding origins of a Heinkel III H-6 F8+KR werke nr. 4430 (possibly of 7/KG40; or alternatively 3/KG40 ?? Luftflotte III - Fliegerfuhrer Atlantik) shot down over Anglesey Wales, at 20.30 on 1st November 1941. All four aircrew were presumed killed in this incident, as the Heinkel crashed with bombload aboard (interestingly - the pilot's body was never found). I believe the aircraft was part of IX Fliegerkorps possibly flying out of Brest ? An alternative base mentioned in literature elsewhere is 'Renne St Jaques, Brittany' - but I cannot confirm this detail. I do know the regional HQ was in Rennes at the time. Can anybody help solve the mystery ? Cheers.