was just looking up about distance between tracks and found a website that says "Most standard UK railway lines have a distance of between 3.5m and 4m from the track centre of one track to the track centre of a parallel track" just thought i'd post this for anyone who's laying track in the UK. If anyone can find out any more specific areas for track laying/speed restriction guides, that would be great. I know we have google overlay and that can help but on the route I'm doing the track image isn't very clear