This sequence of photographs was taken from LTJG Finnie's Catalina - U-135 had just been forced to the surface after a series of depth charge attacks by HMS Mignonette, Balsam and Rochester

H.M.S. Mignonette maneuvers to starboard of U-135 as depth charge plumes from LTJG Finnie's depth charge attack subside

U-135 and H.M.S Mignonette maneuver as the boat's crew abandons ship

H.M.S. Mignonette rams U-135 just abaft the conning tower

U-135 sinks beneath H.M.S. Mignonette

S.S. Twickenham down by the bows after being struck by a torpedo starboard side forward - the British 4,762 GRT freighter proceeded to Dakar under her own power screened by H.M.S. Fandango - there were no casualties