Mike,
To help you with your CPC if you decide to take it,get the book : Elements of road transport management by Don Benson its distributed by CCH group LTD TEL 020 8547 3333.This is the book we where given on my course on the last day!! Includes all you need to know to pass both NAT and INTERNAT CPC as well as sample questions etc.
Ref Hanbury Davies if you e-mail Paul Andrews one of the TM,s who looks after the O/D’s he will gladly e-mail you their rate sheet and conditions of employment for O/D’s etc. 