Operation Mermaid

I've just watched this on the Fast32 streaming service. The four ex-naval people had a convoluted and contrived trail to follow and it's remarkable that their journey went more or less to plan. The sound on the version I watched was a bit low, and perhaps that's why I didn't understand who were the bunch of thuggish-looking men who threatened them in the French pub.

Perhaps one for yachting fans, which I'm not, so I may be mistaken in thinking that the cabins were quite large for such a small boat!