Fidor Bank in Germany has Kraken and bitcoin.de as partners. Idk how easy it is to open an account with them for non-Germans, but I use my banka cocunt with them for bitcoin trading and never had a problem.
Sending money to a bank in Germany will cost UK people about £8 and take 1-2 days. It will also end up denominated in EUR so undergoing a currency exchange. There will also be less trust placed in a bank that's in Germany: "why is your bank in Munich if your company is in London?"
That's not that bad, but there's definitely a group of people who would rather deal in their own currency, locally: Sending funds to another UK bank ranges from instant to 30 mins and is free.