I used to visit Britain rarely as a tourist from overseas before the pandemic, and at that time I visited the Great Central Railway (GCR) in Loughborough twice. I was really fascinated by the GCR general atmosphere and its steam locomotives/other old rolling stock. Needless to say, during those 2 visits, I took the GCR trains from Loughborough Central to Leicester North and back, alighting at the intermediate stations and exploring them, many times.
One particular thing that I really liked about the GCR was that I travelled in (a) corridor compartment coaches and (b) non-corridor compartment coaches. Since I am not familiar with the proper British railway terminology, I should probably give some explanation. (a) When I'm saying
'a corridor compartment coach', I mean that its layout is a number of compartments (with seats) linked by a side corridor. As far as I understand, one of its typical examples is BR Mk 1 SK. (b) When I'm saying
'a non-corridor compartment coach', I mean that it is essentially a number of compartments (with seats) without a side corridor (i.e., a compartment occupies the entire coach width), and each compartment has its own exit door to the platform. I guess it should be BR Mk1 Suburban but I'm not sure. I really like these coaches because they remind me some scenes from the iconic
Poirot and
Miss Marple TV series starring David Suchet and Joan Hickson, respectively.
When the international travel becomes as usual as it used to be, I'd like to visit some other heritage railways in Britain. Could someone please tell me what heritage railways allow to travel in corridor/non-corridor compartment coaches? Currently I'm planning my future trips and choosing between (but not limited to) the Gloucestershire Warwickshire Steam Railway, the Bluebell Railway, the North Yorkshire Moors Railway, and the Keighley & Worth Valley Railway. I checked the websites of these railways, and it seems that all of them have such coaches. However, it is not clear how often these coaches are used. I guess it is very likely that open coaches are used, on average, more often on some of these heritage lines but I'd like, if possible, to travel in a compartment coach (if possible).
It would also be very nice if I and one or two my friends could book an entire compartment. Could someone please tell me if it is possible anywhere on heritage railways? It seems that it is more or less common these days because of the COVID-19 and social distancing measures but was it possible in the pre-COVID era?