I created a post of the UK rail network some time ago and have been meaning to return to the subject.
The network is still generated using a station to station methodology, so the next step will be to incorporate an actual network and run it trough PGRouting. The logic for ownership can be found at: maps.gisforthought.com/uk_rail_map/ukrail_distinct_agencies_parent.html
If there are any issues or inconsistencies, please let me know, preferrably through the GitHub issues page: GitHub Issues
I am very happy with the overall result and all the hosting is done from scratch using a virtual server from: Digital Ocean
A good learning experience with NGINX and mobile forwarding.
As a final warning, the mobile version is not very good, if viewing on mobile and interested, please try on a desktop. Sincere appologies for that. Leaflet may not be the best mobile platform, although it is probably due to my inexperience with it.
UK Rail Map by Operator and Owner: