Traffic Penalty Tribunal (TPT) — England outside London
TPT handles council PCN appeals outside Greater London — bus lanes, parking, and moving-traffic contraventions. Hearings can be on the papers, by telephone, by video or in person. Free to appeal and you do not need a solicitor. Around 45% of TPT appeals are upheld in motorists' favour.
London Tribunals — Greater London
London Tribunals (formerly the Parking and Traffic Appeals Service) handles PCN appeals from all 32 London boroughs and TfL. Same three hearing types, same free-to-appeal model. London council and TfL evidence is often less robust than they assume — about 40-47% of appeals are upheld.
POPLA / IAS — private operators only
POPLA (BPA operators) and IAS (IPC operators) handle private parking charge appeals. Free for the motorist. POPLA upholds around 42% of appeals; IAS slightly lower. The biggest grounds at both are PoFA defects, signage, and code-of-practice breaches.