Proculation Proculation:
Drop some sea mines on them.
Better yet, send our subs out after them with no crew and remote control them to stop in front of the Russians with a big flag saying "Free" in Russian.
Then when they board, the subs will catch fire, they all die and we get free russian subs to replace the crap subs the british sold us.
We might even get a couple of nukes out of the whole thing too.
Win win.