Yes I’m in the UK, but currently in St. Maarten.
You’re welcome to suggest my book, details in my header.
It isn’t specifically focused on the UK, but might be of some help.
The UK is getting quite aggressive on KYC Bitcoin purchasing and self custody, but there are some easy supported routes for newbies.
Revolut bank have an easy Bitcoin purchasing option, they also allow you to spend BTC converting it on the fly to fiat. They also, more importantly allow you to withdraw your BTC to self custody.
Other options in the UK are the Isle of Man exchange CoinCorner (the Isle of Man is a UK tax haven). They are a bit heavy handed in their KYC, but pretty good.
For serious purchasing I use SwissBorg who allow much higher limits. They are a broker and hunt the market for the best price, like an arbitrage service.
Let me know if you have any specific questions, or feel free to get in touch. My non NOSTR contact details can be found on my website listed in my profile header.