PCN code 51: failing to comply with a no entry restriction
What this contravention code means, and how to appeal it · Moving Traffic
Code 51 means the council or TfL recorded your vehicle as failing to comply with a no entry restriction. Unclear road signage, or a camera that appears to have recorded the wrong moment, are both grounds worth challenging.
Full description on the ticket: “Failing to comply with a no entry restriction.”
Letter after the code, like 51j?
A letter after the number narrows down the exact circumstances: j means camera (CCTV) enforcement. We factor the exact suffix into your letter automatically.
Can I appeal this?
Yes. This is a statutory Penalty Charge Notice from a council or TfL, not a private charge, so you have a formal right to challenge it before it escalates into a Charge Certificate.