The UK Battleship has the ability to move out of combat with the submarine or even move out of combat by engaging in combat elsewhere. The submarine does not like the UK Battleship in SZ 13.
But as was mentioned, if you are going this route, and I like it, to a point, why not bring the submarine with you in future?
Anyway, ever think of bringing a fighter and just killing that BB and landing an infantry on Gibraltar to prevent England from sinking your fleet?
