2449 shows code "C7" . Roundel the outside circle shows a darker colour than the center so must be RAF , not French. The "C7" looks to be the remnant of it's Luftwaffe code. But itould well be either of these "C7+ ?? or "??+C7".
2450
Show's Blenheim"VT⊙N" K1770 ,
https://aviation-safety.net/wikibase/68502
The one behind serial number is a "3"or a "6" cannot make out the rest of the serial number.