I mean, it’s worth being clear: these are EU citizens who did break the rules, in terms of not registering their (supposedly ULEZ-compliant) cars before driving into the ULEZ zone in London as they are required to. For UK-registered cars, TFL can determine ULEZ compliance directly from the domestic car registry database, which they can’t for foreign cars.

The complaint against TFL is much narrower: the company they used to chase down these rule breakers then itself seems to have broken data protection rules, since ULEZ breaches are civil not criminal matters and so the relevant EU rules didn’t allow for their information to be shared.

But at its core - if these people had just registered their cars as required before they drove into London, none of this would be an issue. It’s not about UK authorities unfairly targeting EU citizens (not least as it’s London we’re talking about - Remainer central!)