Any track plan book will inspire no matter which scale it is. The Peco one is OK but it is set track based. Did David want to work with set track as I get the impression he has plans for a larger flowing layout with flexible track and possibly he wants to model real mainline traffic and sidings around some station within UK?
For real life station layouts you might find that your local library has useful books.
This link may be inspirational from a planning point of view:-
http://ngaugesociety.com/modelling/s...troduction.htm
Cheers
Moped