National Routeing Guide

It is one of the technical railway manuals which exist as part of the operating of the rail network of Great Britain, many of which are now in the public domain.

Customers generally encounter the document in specific circumstances, when they wish to prove (or check) the validity of their ticket on a route which might at first not appear obvious.

[6] As such it is a powerful tool in the arsenal of the knowing consumer, given the current complexity of ticket choice on the GB rail network.

These easements are exceptions to the acceptable routes which are otherwise explicitly defined, and are listed in Section E of the Guide for easy reference.

"Others are matters of convenience: "Easement 020003: Passengers for Aviemore and Carrbridge are permitted to alight from the sleeper at Inverness and double back to their destination in the morning.

"The relevant section of the Guide, which is currently available at the Rail Delivery Group website, details more than five hundred different easements.

Train operating companies may make special arrangements for disabled passengers, who have further exemptions on an individual case basis.

This allows for different routes in certain situations, such as where normal practice is to walk between two nearby stations on different lines to catch a connecting train, which wheelchair users might find difficult.