@Gargron you seem to be really enjoying Cumbria specifically. If you don't mind a somewhat terrifying drive, look up Hardknott Pass. It's Britain's steepest road and has lots of insane corners, most notably a hairpin turn where if you come off of the road, you're not going to be getting back on to it again (I nearly died there myself the first time I drove it, in a clapped out Ford S-Max, pitch black and heavy rain!), but there's the remains of a roman Fort there which is a must-see!