1409 Flight were Bomber Command's Meteorological unit based at RAF Oakington.
On the RAF history website:
2 April 1943
The only Bomber Command operation on this day was the first sortie of the newly formed No 1409 (Meteorological) Flight, based at Oakington. One Mosquito, crewed by Flight Lieutenant P Cunliffe-Lister and Sergeant I Doyle, made a weather reconnaissance flight to Brittany in preparation for the Bomber Command raids to be carried out in the coming night. The Flight operated until the end of the war, flying 1,364 sorties and losing only 3 Mosquitos.
Neither Cunliffe-Lister or Doyle appear to show up on the CWGC database.
So I checked a PoW website, which now I've found it looks fascinating and......on it we find.....
Michael Cunliffe-Lister is seeking information on his late father Sqdn Ldr Philip Ingram Cunliffe-Lister, DSO. He served in 1409 (Met) Flight of which he became CO in June 1943. On 18th July 1943 he made a forced landing in Germany after his Mosquito ran out of fuel following a navigational error. He and his navigator, P/O Pat Kernon evaded capture for 4 days but were rounded up and sent to Dulag Luft and thence to Stalag Luft 3 at Sagan where he remained until the end of the war. He died in 1956 when Michael was 7 years old.
http://www.prisonerofwar.org.uk/
This has been interesting....