UK Webmasters, help me please

[ionic]

For the past month or so my earnings from the websites i run (both mainstream and adult) have been growing, to the point where it isnt pocket money.

I'd love some advice on what the next step is in declaring my earnings and paying tax, whats the simplest/best way to do this? Just hire an accountant or go through my bank or do all my tax returns myself?

Would it be benefitial to explore registering as an llc or just as self employed?

I realise these are newb questions, and im reading up on this like mad - just wanted some advice from people who have gone through a similar thing and can guide me a little, or point me in the right direction.

Thanks