Offence Not on the Warden's Permitted List
A traffic warden can only issue a fixed-charge notice for offences on a specific government-approved list. That list covers certain parking and traffic rule breaches, bye-law breaches, and tax-disc display — nothing else. If the offence on your notice is not on that list, the warden had no power to issue it.
Legal basis
Local Authorities (Traffic Wardens) Act 1975 s.3(1) (as substituted by s.12 RTA 2002); S.I. No. 525/2022 reg.3 and Schedules 1-5.
How to identify this in your case
Look at the exact offence written on your notice. Ask yourself: is it vague (for example, just 'illegal parking'), is it nothing to do with parking, or does it look like it might refer to an old rule no longer in force? If yes to any of these, the warden may have gone beyond what they are allowed to do. This ground is for you if the specific rule you are accused of breaking does not appear on the government's approved list of offences wardens can issue notices for.
Sample appeal wording
formal
Replace [PARKING DATE], [NtK DATE] etc. with your own dates before sending.
Beat It writes this argument automatically
Scan your PCN — our AI checks if this ground applies to your specific ticket, drafts a properly-cited appeal letter, and submits it to the council on your behalf. Only pay if you win.
Scan my ticket