Out of interest, searching through my 1957 Combined Volume, I found twenty locomotive classes with, then, fifty or more survivors that are yet to be made or announced as RTR models.
There are none from the WR, and only one - the U 2-6-0, from the SR.
The old LMS offers the Fowler and Stanier 2-6-2Ts, the Johnson 0-6-0T, the Aspinall L&Y 3F 0-6-0, the Mackintosh Caledonian 0-4-4T and 0-6-0T, the Drummond Caledonian 2F 0-6-0, and the Midland 2F 0-6-0.
The LNER has the B16 4-6-0 (NER), the K2 2-6-0 (ScR), the J6 (GN), J17 (GE), J26 and J27 (NER), J35 and J37 (ScR), the N5 (ScR) and N15 0-6-2s, and the J69 0-6-0 (GE).
Any one would be welcome from Bachmann.