Another piece of advice from British Railways in 1961. If you have the proper appliance, you can move Scammell Mechanical Horse trailers by hand - if they are empty of course.
I didn't know this ever happened. I can't recall ever seeing photos of it being carried out, nor anything on the hook device to allow it to be done. Presumably this did take place or the booklet wouldn't mention it.
If anyone has more information, It would make an interesting little cameo on a layout.