Greetings Lensmeister.
By miles and chains books are your refering to something like Quail maps?
http://www.trackmaps.co.uk/diagrams.htm
Would the next London Area book "due September/October" have these updates? Sorry, I dont know a great deal about it
While browsing on this subject I found this map:-
http://www.systemed.plus.com/New_Adl...lway_Atlas.pdf
It seesm to be a 1MB pdf file, which allows you to zoom in. What is nice is that it highlights new and old lines but unfortunatley only for southern half UK.