The ORB, for modellers, is singularly unhelpful, around that time. The account, for May & June, 1940, is comprehensive, regarding what happened, day by day, but doesn't mention aircraft serials, codes, or pilots. There's a note that their Intelligence Officer had been sent home on sick leave, which probably explains it. April and July are as normal, but not those two months, sorry. If you're still interested, I can photograph the relevant pages, on another visit, and send them to you.
Edgar

The serial number is not known. The wreckage was excavated (Steve Vizard) for a BBC documentary in June 2004 about 1 Squadron. If they could not determine the serial number then it's very unlikely it will ever be found.

Returning to base with oxygen failure, shot down by Bf110s during solo attack on Do17s and abandoned north-east of Perthes 7.15 F/O Drake baled out wounded in back and legs. Admitted to hospital in Rethel.

A contemporary report of French 9eme Armee activities and a letter in 1989 from Jean Logeart-Hans of Perthes. who attended Drake and drove him to hospital, both record this event as 11th May. The date usually given, 13th May, is based on Paul Richey's memoirs, Surviving RAF records do not resolve the question.

It is likely that the squadron codes were painted out (Peter Cornwell lists the hurricane as coded *P in "The Battle of France Then and Now") and possibly the serial number as well. Undersides may have been painted a light blue colour and the rudder in red, white and blue stripes.