The debt owed to TfL from unpaid clean air levies has skyrocketed to £376 million. Neil Garratt expressed that this amount is alarmingly high, highlighting TfL's escalating issues with bad debts, which have reportedly reached £450 million. Garratt questioned whether bailiffs would be deployed. Mr. Khan acknowledged the dire situation, emphasizing that actions would be contemplated to address this alarming debt, citing a need for accountability among drivers who violate the regulations with substantial outstanding fines.