Untaxed interest on an HMRC letter isn’t a mark of shame. It’s just a bureaucratic handshake: “We see you earned a bit extra. Please be a dear and sort your taxes.” Ignore it, and you’ll end up with a £100 penalty and a stern letter that looks like it was written by a disappointed headmaster. Respond politely, and you might even get a “Thank you” in return. Probably not, though. It’s still the government.
So next time you see that dreaded phrase, take a breath. Check your allowance. Pay what you owe (if anything). And remember: your money is not a criminal. It’s just a bit of a slacker that forgot to file its own paperwork. Now go eat a biscuit. You’ve earned it.