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Could do a tour of the Blackhorse Rd area taprooms: https://www.cktravels.com/walthamstow-beer-mile-brewery/
Some of those are pretty MOR, like Big Penny (formally Trumans) and Signature - mostly just low abv lagers and pales.
Wildcard will be more interesting but not been for a long time and don’t know the others, but sure all will have sours to try.
My favourite places locally are Neckstamper and Gravitywell.
https://www.neckstamper.com/
https://www.gravitywellbrewing.co.uk/ -
Beerblefish? https://www.beerblefish.co.uk/taproom/
Just noticed it's up by the other Blackhorse Rd places
Taproom recomendations (London) or maybe even a quick train out, something not on the beer mile, have an interest in sours and somewhere a little experimental. Really enjoyed Gypsy Hill.