Have you been caught by HMRC yet? There are 40,000 letters HMRC have sent out to landlords who have not previously declared their property income.
So far I have heard of 3 in Plymouth. I think this is significant and if you think they won’t catch you, I think its more a case of when they will catch up with you.
Telling them before they get to you is much cheaper in penalties and could save you thousands!!