Detailed
For some English routes and all for free search my name, angelah, there are plenty.
My biggest is the run from London Paddington to Reading in Berkshire. I am again working on the second section, but that will take a long time to complete.
Other 'real' routes are Kent & East Susses Railway and Hayling Island, a smaller single line route.
Try Branchlines UK and Branchline SLW. A ficticious route in Blackheath Downs and that comes with two kinds of track. I suggest the Norfolk track version, that track is on the DS.
You can get some downloads from my site (below), they are zipped files so should come down faster.
Blessings,
Angela