You can challenge a no entry PCN by making representations to the issuing authority within 28 days, and appealing free of charge to an independent adjudicator if it is rejected. The grounds that succeed most often are: the No Entry sign was not compliant or not visible at the point of entry, the sign did not match the traffic order, you entered from the permitted direction, the manoeuvre was forced by an emergency, or the camera evidence does not establish the direction of entry.
No entry cameras are placed at one-way exits and restricted streets that catch drivers in volume, especially those unfamiliar with the area. Volume is where poorly positioned signs and ambiguous footage hide.
The rule, precisely
A No Entry restriction is only enforceable if it is signed correctly. The sign must conform to Diagram 616 of the Traffic Signs Regulations and General Directions 2016: the circular red sign with the white horizontal bar. It must meet the prescribed minimum size, and be positioned at the entrance to the restricted road so it is clearly visible to any approaching driver before they commit to entering.
The restriction must also be authorised, either by a Traffic Regulation Order under the Road Traffic Regulation Act 1984, or by the one-way layout of the street itself. The physical signs must match that authority.
The contravention enforced by councils is code 51: failing to comply with a no entry restriction. The authority is not proving you were on the street. It is proving you entered it from the prohibited direction, warned by a lawful, visible sign.
Who can fine you
In London, boroughs and Transport for London have enforced no entry restrictions by camera for years under the London Local Authorities and Transport for London Act 2003. Outside London, councils gained the power from 31 May 2022 under Part 6 of the Traffic Management Act 2004, but only where a Designation Order covers the location. The wider framework, deadlines and appeal routes are in the moving traffic PCN guide.
The grounds that succeed
1. The sign was not compliant or not visible at the point of entry.
This wins most no-entry cases. If the Diagram 616 sign was obscured, undersized, angled away from your approach, positioned beyond the junction mouth, or missing, a driver could not comply with a warning they never received. Photograph the entry from a driver\'s eye line, early.
2. The sign did not match the traffic order.
Ask the authority to produce the Traffic Regulation Order, or evidence of the lawful one-way designation, and confirm the signs reflect it. Discrepancies between the order and what is on the street are a recognised ground.
3. You entered from the permitted direction.
If you approached and entered from the legal end, or the enforcement footage shows a different vehicle or registration, the contravention did not occur. Dashcam footage of your route settles it.
4. The entry was forced.
An emergency vehicle behind you, a sudden obstruction, or a road condition that left no safe alternative. Set out precisely what happened and invite the authority to exercise its discretion.
5. The evidence does not prove the direction of entry.
The camera must be an approved device under the Civil Enforcement of Road Traffic Contraventions (Approved Devices, Charging Guidelines and General Provisions) (England) Regulations 2022 (SI 2022/71). The footage must show your registration and the direction of entry unambiguously. Angles that leave the direction of travel in doubt do not discharge the authority\'s burden.
Challenge your no entry PCN with the right letter
The Code 51 No Entry Challenge Letter covers sign compliance and position, the traffic order, direction of entry and camera certification. £15.
What does not work
- “I followed my sat nav.” Sat nav error is not a defence. But if the sign was not visible in time, that is a signage-compliance ground worth making properly.
- “There was no traffic and no harm done.” Absence of harm is not the test. A compliant, visible restriction applies regardless.
- “Everyone uses that street as a shortcut.” Other drivers’ conduct has no bearing on your case.
- An apology and an explanation. Case officers cannot cancel a penalty out of sympathy. Give them a legal reason.
Put the authority to proof
A no entry challenge is a signage-position and evidence case. The representations that succeed pinpoint the element the authority cannot prove, cite Diagram 616 and the regulations, and demand the traffic order and full footage that decide it. The closely related restriction is the banned turn PCN, and the underlying signage principles are covered in the defective signs and road markings guide.
The Code 51 No Entry Challenge Letter is built on those grounds, with the traffic-order and evidence demands included, for £15.
The letter for this
Council PCN Code 51, Failing to comply with a no entry restriction
Written for this specific ground, with the law cited and the evidence demands built in. Complete the placeholders and send it.
Included free with the letter
- How to Submit Your Tribunal Appeal
- How Council Parking Appeals Work
Frequently asked questions
What is a code 51 PCN?
Code 51 is the moving traffic contravention for "failing to comply with a no entry restriction". It covers entering a road, or a section of road, in the direction a No Entry sign prohibits, including the exit end of a one-way street. It is a civil penalty enforced by camera, with no points and no criminal record.
What sign does the council have to prove was there?
A No Entry restriction must be signed with a sign conforming to Diagram 616 of the Traffic Signs Regulations and General Directions 2016: the circular red sign with the white horizontal bar. It must meet the minimum size, and be positioned at the point of entry so it is clearly visible to a driver before they commit to entering.
The sign was around the corner, after I had already turned in. Does that matter?
Yes. Position is part of compliance. A No Entry sign only works if a driver can see it before the point of no return. If the sign sits beyond the junction mouth, is angled away from your approach, or is hidden by a parked vehicle or street furniture, the restriction was not properly communicated and the contravention is open to challenge.
What if there was only one sign and it was obscured?
No Entry points usually need the sign to be clearly visible on the approach. A single sign hidden behind a van, scaffolding, foliage or another sign cannot give the warning the law requires. Photograph the entry from the driver's eye line quickly, because obstructions move and councils reposition signs after complaints.
The camera is at one end but I entered from the legal end. Can I still be fined?
You should not be. The authority must prove your vehicle entered from the prohibited direction. If you entered lawfully, or the footage does not clearly establish the direction of entry, the contravention is not made out. Ask for the full, unedited footage, not just the stills.
How long do I have to challenge?
The PCN arrives by post and states your deadlines. You normally have 28 days to make representations, and paying the discount ends your right to challenge. If the authority rejects your representations, you have 28 days to appeal free of charge to the Traffic Penalty Tribunal (outside London) or London Tribunals (in London).
Make the council prove the sign and the direction.
The Code 51 No Entry Challenge Letter covers sign compliance and position, traffic-order mismatch, direction of entry and camera certification.