The 20, 31 and Western are all out of service.
The 47 and 55 are both operational and main line certified.
The 37 is operational and has visited several preserved railways in recent years.
I thought that the western was operational. A man who was working in the diesel depot at the nrm said that the 20 and D200 were operational.
I know that the 31 has always been sat in the same place in the Great Hall.
And i also thought that there were plans to mainline certify the 37.
The NRM is a bit like stainmore. They say all locos work but never seem to get any use.
No offence to any working party of these railways.