Buying books from UK, legal?

Hello, I want to ask (preferably people in the UK) is there any legal/restrictions in buying Fakku books (physical/digital)? I’m interested in getting Tales of a Harem in Another World but notice at the checkout screen it says makes sure it’s legal at your residence. I don’t want to get penalised for supporting the artists work & I can’t seem to find a concrete answer.

So for those living in the UK & have bought from Fakku website recently, any issues or am I worrying too much?

Not british but you can buy them in an uk store. United Publications

You can buy FAKKU books on UK retailers like Blackwell's and Waterstones. You're fine.

Oh that I know. It’s more from Fakku website (as the titles I’m interested in aren’t available in any UK stores - plus it’s digital only)

I imagine it's fine as long as It doesn'tt have Loli, Shota or extereme bondage from what I remember of UK pornlaws