RS523 GSM-R Iss 1.1

This handbook is intended as guidance to users of the GSM-R system used on the GB mainline railway.

An amendment to Issue 1 of this Handbook has been published in the December 2017 Periodical Operating Notice, and is also included in the Rule Book App from 2nd December. This issue 1.1 has been published on the website so that a completely up-to-date version incorporating that amendment is available. However, the printed version of this Handbook has not been updated and Issue 1 dated December 2016 remains the issue that will be supplied from the printers.