This will probably change as time goes by, yes, it’s now 6 sections:-
1. Severn Valley Railway – diesel
2. Severn Valley Railway – steam
3. Main line steam
4. Main line – the older diesels
5. Rest of main line
6. Preserved Railways (except SVR)
The videos will be listed in reverse date order, hopefully they will improve, as I made a few mistakes with some of the earlier ones! More sections can be added later, as appropriate.