One suspect that old boy is thinking about Commander A. K. Gatward of No. 404 Squadron.....
It was on the 12th of June '42, when he flew (Sgt. G. F. Fern was his navigator) Beaufighter T4800, ND-C, at deck height through Paris, dropped the French tricolour over the Arc de Triomphe, then cannon blast the Gestapo HQ, which was located in the Ministry of Marine building....
Aeroplane Monthly March 2010:
Gatward and Fern: