Originally Posted by
TribalistMeathead
I'm beginning to think a stack of 20s is the simplest solution.
Yep. Simplest all round.
The bank may take the old £1 coins off you if you ask nicely, although they often restrict it to customers. Try a Post Office too. Failing that, as mentioned above, your landlady might be willing to do it. If more than £20, bag them up in lots of 20 (bags available from a branch).