This seems like a good idea ... OS mapping but in an A to Z format. I like the fact that there's a place name reference/index at the back too.

http://www.az.co.uk/?nid=527

Yeah I like the idea but it doesn't say if it's waterproof paper or not. I used an AtoZ on my motorbike in London and it needed replacing every 12 months.
Tuff Maps were better but the mapping was pretty poor.