Hi JGUIGNARD
According to a reference (The Mighty Eighth in Colour by Roger Freeman):
"The 8th Airforces only long term B25 arrived in the UK in March 1943 when it was still planned to send combat groups of this type to the European theatre. The aircraft was subsequently used for communications work and was written off in France on 26th October 1944 after being hit by anti-aircraft artillery fire while on a courier mission".
About a year ago I visited North Weald air field (ex WWII Fighter Command, now private) where there is the shell of a Mitchell bomber hiding in long grass and looking very sorry for itself. I have a photograph if you are interested.
Cheers
Bill Brignal