17 Flying Fortresses, and are described  as such by Capt. Freycinet. There actually were two Free French  heavy bomber squadrons based in England: Groupes de Bombardment GB  II/23 "Guyenne" and GB I/25 "Tunisie," which were part of the Royal  Air Force as 346 and 347 Squadrons respectively. However, they did  not fly Fortresses. Their aircraft was the British