I hope I'm not ruining the positive spirit... just because it's in your head doesn't prevent the state from claiming the right to tax it, so I think their questions are valid - even though they don't understand the tech.

I'm sure you're probably already aware of this. Just thought I'd mention this for others - too many examples of people paying a heavy price for getting these things wrong.

Good thing you're getting out in time and the UK doesn't (yet) have an exit tax!