The Cambrian lines in the early 70s seem a good subject for a "Mini-module" style layout inspired by Sir Madoc's work, inspired by family holidays in the area in 1974 and 75.
I've got as far as acquiring a Farish class 24 and a couple of blue DMUs, which prompts some other questions on rolling stock.
Most photos of the coast line freight have shown the signature gunpowder vans, plus 16t minerals and Vanfits. Were any other wagon types common? I once saw cattle wagons marshalled between the loco and the gunpowder vans, presumably as barrier wagons, though I'm told that was exceedingly rare.
When did the Aberystwyth oil traffic go over to trainload operation, and what wagon types were used before and after? For that matter, what was the motive power? Class 24s or something else?
What was the formation of the Aberystwyth to York mail? Memory suggests two Mk1s (SK + BCK?) plus a few assorted pre-nationalisation vans.
I remember class 101, 103 and 108 two-car DMUs, with four coach trains made up of two sets a common formation. Were three-car sets ever used?
Did class 40s ever run up the coast on Summer Saturdays? Only ever remember seeing them east of Machynlleth, with pairs of 24s on the coast services.
I know my main British outline interests is Cornwall, but everyone needs at least one side-project.