Keith,
I think you will be as well as me when I am at Kew
Before to plan a visit I invite to check their info here :
https://www.servicehistorique.sga.defense.gouv.fr/en
and contact me off board.
I have been in contact with DAve Mitchell ; him and 6 others UK pilots posted on n°341 sqdn on 6/3/1945.
Bertrand