Hi Strutter15,
you are asking for records of captured aircraft by British troops?
Have a look here:
http://www.ukserials.com/
Check under 'Misc' for miscellaneous serial codes.
Scroll down to the 'G' section. There are more than 300 captured aircraft listed.
(That letter in the alphanumeric coding for army aircraft was preserved for captured
German aircraft in WWI.)
...not all, but several of them were taken to the experimental airfield Martlesham Heath, where the RAF mainly did evaluate foreign and domestic aircraft.
Cheers
Aquilius