Hello Roger and Amrit,
As matter of fact these pictures are also in a photo album which is for sale on ebay right now!
http://cgi.ebay.de/ws/eBayISAPI.dll?...m=130326113434
If you scroll some further the serial is on one of the pictures: it seems to be P4340 at first sight, but I think it actually might be P4346. P4340 was allocated to 83 Squadron and lost 13 August 1940 near Mesum (Germany). P4346 was from 61 Squadron and lost 22 June 1940 near Jollenbeck (Germany).
Regards,
Hans Nauta