Hi Ade.
From various sites the story of 605 Squadron looks like this.
A new No. 605 squadron was formed at RAF Ford on 7 June 1942, equipped with Douglas Boston and Havocs in the intruder role. These were replaced with de Havilland Mosquitoes from February 1943 and it continued to operate this type until the end of the war, moving to Belgium in March 1945 and the Netherlands in April. The squadron disbanded by being re-numbered to No. 4 Squadron RAF on 31 August 1945 at Volkel Air Base..
605 squadron operated with the bomber streams to counter German night fighters. Medium Sea Grey/Dark Green uppers with Black undersides and a black nose.
7 June 1942 15 March 1943 RAF Ford, Sussex Second formation
15 March 1943 6 October 1943 RAF Castle Camps, Cambridgeshire
6 October 1943 7 April 1944 RAF Bradwell Bay, Essex
7 April 1944 21 November 1944 RAF Manston, Kent
21 November 1944 15 March 1945 RAF Hartford Bridge, Hampshire
De Havilland Mosquito NF.II: Feb 1943
DZ691; DZ714; DZ716 (UP-L); DZ717; DZ723; DZ724 (UP-S)
De Havilland Mosquito FB.VI: Jun 1943
HJ761 (UP-P); HJ766; HJ767 (UP-G); HJ768 (UP-Q);
HJ775 (UP-U); HJ776 (UP-E); HJ778 (UP-A); HJ779 (UP-L); HJ780 (UP-X); HJ785 (UP-T);
HJ808 (UP-O); HJ827 (UP-K); HR152 (UP-S); HR203 (UP-V); HR205 (UP-A); HR206 (UP-M);
HR349 (UP-W); HR363 (UP-U); MM414 (UP-Y); MM429 (UP-H); NS838 (UP-J); NS876 (UP-P);
NS880 (UP-M); NS914 (UP-X); PZ349 (UP-A); PZ381 (UP-K); RS567 (UP-S); RS678 (UP-T);
SZ967 (UP-U); SZ993 (UP-A); TA112 (UP-O); TA117 (UP-Y); TA383 (UP-
FB.VI — Currently under rebuild in the main hangar 605 Squadron markings 'UP-G'
http://www.airport-data.com/aircraft/photo/612217.htmlhttp://www.airport-data.com/aircraft/photo/612216L.htmlNB: From what I've read the Grey undersides are early deliveries, or replacement aircraft. All machines would have been painted in the standard Night Intruder Black undersides quite quickly, hence the two schemes.
Please note: The proper Night Fighter II version should have the Radar antenna.