With his entry on “Allied (non-British) Submarines in WW2”: as Germany overran Europe some submarines escaped to the UK. Some French boats operated from Harwich and the Ninth Flotilla was set up at Dundee, operating Polish, Norwegian, Dutch and French boats supported by HMS Ambrose.
In the Mediterranean a few Greek boats escaped to Alexandria and some Polish boats operated from Malta. Dutch boats in the Dutch East Indies escaped to Fremantle, Western Australia. In the Pacific USN submarines virtually annihilated the Japanese merchant marine.