Ideas for a cheap 2-3 night stop for two in the UK?

[Major Fallout]

I'm looking for ideas for a short getaway this month with my girlfriend.

I quite like the idea of a holiday cottage somewhere north, but with not really having a location in mind, it narrows the choice down to a couple of thousand.

So really I'm after some recommendations, something different, not too expensive, and will accept a short stay.

Any ideas?

[Shinobi]

Groupon or travel zoo might be worth a look if you want cheap. Some good things it looks to be at short notice.