I've mentioned before that I have a folder of "hmm, I could do something with that" stuff & if I don't use it after an amount of time I post or delete.
I am having a 'sort it' afternoon.
This is one where I just didn't get suitable footage to properly play with, but I have a soft spot for old tech & flashing lights.
I'm fairly confident it's the Harwell Dekatron Computer (the WITCH) at the National Museum of Computing. I recommend a visit.