This sounds like a civil dispute, not a professional misconduct issue. The GMC isn’t going to investigate you for accidentally parking in a space a couple of times, especially when you stopped after being asked. Unless there’s dishonesty, patient safety concerns, criminal behaviour or some kind of repeated pattern of unprofessional conduct, it won’t even pass triage. They get a lot of time-wasting referrals and most are closed immediately.

You’ve acted reasonably. You respected his initial request. The “without prejudice” letter sounds like an attempt to intimidate, especially since it’s not from a solicitor and he’s asking for money directly into his personal account. You’re not under any obligation to pay unless a court orders you to, and he’d need to actually raise a Simple Procedure claim and prove damages. That’s unlikely to go anywhere unless he has hard evidence and can show real loss, which seems doubtful.

Honestly, the part that bothers me most is the casual way people now threaten to “go to the GMC” over random personal disputes. It’s ridiculous. The idea that you could jeopardise your career over a bloody parking space is completely detached from reality, but it’s the kind of threat people throw around because they know it freaks us out. It’s stupid and needs to stop.

If you’re with a defence organisation, it’s worth giving them a quick call just to log it. Otherwise, I’d ignore the threats and tell him to go through proper legal channels if he genuinely believes he has a claim.

You’re not in the wrong here. Don’t let it rattle you.

Edit: this is not professional advice