London’s Metropolitan Police said it impounded a total of 90 cars over the past weekend as part of an operation tied to the force’s ongoing clampdown on what officials describe as “antisocial driving behaviour.” The action represents the highest number of vehicles seized in a single operation, as well as the greatest total value of cars involved, since the initiative began around five years ago.

On Monday, the Metropolitan Police confirmed that officers seized more than seven dozen vehicles in some of London’s most affluent areas, including Hyde Park, Kensington and Chelsea, between August 7 and 9. Among the cars taken was a 1-of-499 Ferrari Monza SP2, estimated to be worth around $4.7 million, with the total value of the seized vehicles reportedly reaching about $10 million. According to the Met, the Monza had been in the country for only a few hours when it was seized; the owner was allegedly driving it without proper insurance and held only a provisional licence.

In the U.K., antisocial driving can include, among other offences, creating excessive noise pollution, street racing and cruising in convoy, according to CBS News. Some vehicles were also seized in connection with other alleged crimes, including one case in which an individual was arrested on suspicion of possession with intent to supply Class A, B and C drugs.

The operation involved 120 Metropolitan Police officers, including around 95 from the Special Constabulary and the Vehicle Enforcement Team. Officers were also assisted by representatives from the Motor Insurers’ Bureau.

“We regularly hear from local people who are fed up with people driving cars dangerously in the area, or with modifications which make them a nuisance to those who live nearby,” Special Chief Inspector Geoff Tatman said in a statement. “Through operations like this we’re arresting these drivers and seizing their cars so we can keep our roads safe and send a clear message that we won’t put up with their reckless and dangerous behaviour.”

Given the level of success achieved in this particular crackdown, it would not be surprising to see more enforcement drives of this kind in future, and it seems unlikely that this seizure total will stand for very long. Even so, it is hard to imagine the Met ending up with another Monza in its custody anytime soon.