I have come across a Pathe newsreel about the 1000 bomber raid on Cologne 30 May 1942 which shows some 102 Sqn Aircraft see link http://www.britishpathe.com/video/on-the-chin
you may have to cut and paste the link.
The aircraft seen at 06:12 is a Halifax bomber, coded DY-G, of 102 Squadron.
At 06:20 is another Halifax, coded DY-J, also of 102 Squadron.
At 06:34 is a third Halifax, coded DY-C, again of 102 Squadron.
I think DY-G is Halifax W.1066, DY-J is Halifax W.1167 and DY-C is Halifax R.9494 given the date of the film.