The railway network of the United Kingdom is operated with the aid of a number of documents, which have been sometimes termed "technical manuals, because they are more detailed than the pocket-timetables which the public encounters every day. Historically, they were classified PRIVATE and not for publication, however since rail privatisation they are now all in the public domain, mostly in digital form, because they are produced centrally and not by the regional rail operators.
and distributed by National Rail Enquiries:
Every ticket purchased is a contract, and this document is the terms of that contract. It is produced by the Rail Settlement Plan, part of the ATOC.

and produced by the ATOC:
ATOC is a body which represents 26 train operating companies that provide passenger railway services
It is noted as being a particularly complex document to negotiate, one blogger stating I can only look at the NRG for about 10 minutes without going insane"and produced by Network Rail:
Network Rail owns and operates Britain's rail infrastructure

and produced by The Stationery Office with permission from Network Rail:

Also by Network Rail
Documents produced by the ORR (formerly the Rail Regulator):

Documents produced by the Rail Safety and Standards Board: 
Full details of operating practices.
Primarily of use for design.
It is noted for beginning with item 1 as "queuing". Both the existence of bylaws on the subject, and their prominent placement, are seen by some as typical of Britain.