The UK has no specific rules for Bitcoin. That's one of the reasons it's nowhere compared to other countries. Lack of rules means banks get twitchy about having anything to do with it.
I don't think selling through Localbitcoins or anything P2P on a regular basis is particularly advisable. Multiple payments from a different people every month will drive your bank nuts. They'll think you're money laundering or operating an undeclared business.
Easiest way is to sell through Coinbase Pro and send to your account though I'm not sure what the situation is with bank transfers. They may have stopped faster payments for now. Alternatively withdraw from Coinbase to Paypal and from Paypal to your bank and they won't see anything crypto related.