I live in UK! When I clicked on this blog post I really thought it would be the advice for Americans! Happy to be wrong! LOL!
I suppose you would have to declare it all by being a self-employed? I know for sure, self-employed do fiddle with their taxes here a lot!
Your mic, by the way, is great, catches no noise! It is just sitting kinda weirdly... almost like stabbing you in the throat?