During my career as a railway signal engineer I collected a vast  number  of technical documments which I know could be of use to those working on heritage lines or possibly parts of the national system where older types of signalling equipment are in use and modern standards may not exist.

This is not a comprehensive collection or an authoritative manual on how to carry out  a given  item of work - its  really the contents of my loft placed on the internet for you to use as you wish!  It will hopefully be more use here than left gathering dust.  I cannot guarantee how up to date or accurate this information is and you have the responsibility of using it correclty.I am still in the process of uploading information so you may have to wait for what you are looking for. For the latest Railway Group Standards these can be found on the RSSB website. You will  need to apply to Network Rail if you require copies of their latest standards.