An investigation’s found not a single airline has been fined by the regulator in twenty years.

The study by Which? claims the Civil Aviation Authority “should be doing more” to pursue court action against carriers that break the law – like around flight delay refunds.

It was given the ability to apply for enforcement orders in June 2003, but has only used this power once against a major airline.

The consumer group noted that Heathrow-based British Airways was fined in the US earlier this month, but there wasn’t similar action here.