I visited the V&A East Storehouse last week and what a great experience!
The V&A East opens next year but in the meantime the Storehouse is open
https://www.vam.ac.uk/east/storehouse/visit
I'm often interested in a building itself, never mind the contents, and this building doesn't disappoint.
It's less than a 10 minute walk from Hackney Wick overground station.
All free of course!