Give it a try [Crypto.com](https://platinum.crypto.com/r/hz3dzstewl) or [Zypto](https://ref.zypto.com/bSrubOI3KWb), for example (still trying to post a review of it). Unsure if they are restricted there in the UK.

Exchanges always get you better rates than conversions via other dapps/providers, but I would say, anything below 5% fee from FIAT to Hive, is a win already.

On PeakD you also have a couple of options on the exchanges, but they are mostly OK if you already have crypto.