[frereubu]

For those in London who want to see one of these in the flesh, as it were, there's one in Tottenham: https://www.mbeam.org/

[blipvert]

There’s also the amazing Crossness, which does have occasional steaming days. And if you’re in Manchester the Museum of Science and Industry has a great collection of small and large engines which they run

[davidpapermill]

Yes, Manchester has a good collection but the exhibits are sadly lacking on technical details, be warned.