Whoever you went to see, I've never, ever heard any 'advice' along those lines. Sounds like total bilge to me. The problem with the UK is that the HMRC have basically published a few paragraphs a few years ago and now leave it to everyone else to interpret them.

This geezer - https://www.reddit.com/user/krissaroth  I think is an accountant and has written quite a bit in r/bitcoinuk. Maybe it's worth PMing him. If he himself doesn't do crypto he might know someone who does.

Lots of other threads about it in there too.