The National Museum of Computing, on the Bletchley Park campus, is to reopen in early September. And in the meanwhile, they present a 3D virtual tour - I've collected some links to particular points of interest - but there's a lot more in there, including ICL, Elliott, lots of microcomputers.
https://retrocomputingforum.com/t/tnmoc-to-reopen-and-a-virtual-3d-tour-right-now/1375
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Been there like 5x over the last few years. My favourite is the Radio Hut where you can actually meet people doing long distance transmissions
It's worth noting that while #TNMoC is on the #BletchleyPark campus, it's a separate institution with its own (much lower!) entrance fee. Although you can visit both in a day, I found myself coming back to TNMoC much more often than revisiting BP. I'd recommend TNMoC first and BP in the remaining time. Also notable that it's TNMoC that now has the Bombe, as well as the Colossus which it always had.
Bletchley park is a short and easy journey from London, if you have a day in hand.
@kravietz