Around 13% of cars in London are thought to be uninsured, a report has revealed.
The Motor Insurers' Bureau (MIB) said the nation's capital had more illegal drivers than anywhere else in the country, but revealed it was closely followed by Merseyside, at 12%, Greater Manchester, at 10%, and West Yorkshire and the West Midlands, both with 7%.
The West Midlands was also revealed to contain six of the 10 postcodes with the largest number of uninsured drivers, while almost half of all vehicles in the B03 area of Bradford were reported as having no cover.
The MIB estimated that more than 1.7m drivers had broken the law in the last year by driving without car insurance.
Ashton West, chief executive of the Motor Insurers' Bureau, said: "The fact that 1.7 million motorists still take to the roads without insurance is staggering, but there is no doubt that the number of drivers caught each year is increasing significantly, so drivers simply cannot afford to be complacent.
"Indeed, the number of drivers across the UK who were caught without insurance last year would fill Wembley Stadium more than twice. The message to motorists is clear: driving uninsured is simply not worth the risk."
© Press Association 2009