Overview

• TfL says drivers with four or more unpaid penalty notices account for 94% of outstanding Ulez debt, valued at about £789–£790m.
• Between January and June 2025, enforcement recovered roughly £16.5m, with more than 530 vehicles seized and over 350 sold at auction for about £285,000.
• Officials plan legal escalation through county courts, with potential bankruptcy proceedings, wage recovery from employers, and debts enforced before property sales.
• Compliance remains high at over 97% of vehicles seen in London, focusing enforcement on a relatively small group of persistent non-payers.
• TfL is boosting data-sharing with the DfT and DVLA, trialling clearer PCNs to prompt earlier payment, and addressing errors linked to camera or number-plate tampering.