Chislehurst in Bromley is famous for its man-made cave system, but now has other connections to the underworld. According to new 'research', the town rules the UK for car crime. 3.8% of local motorists made insurance claims for break-ins or theft over the past year (the national average is 1.17%). Meanwhile, Ilford and Romford postcodes fill six of the top twenty spots. We're always a little suspicious of reports conducted by companies with an interest in the results (in this case a price comparison website whose aim is to sell as much car insurance as possible). However, we can't fault the data, drawn from 3.8 million claims and quoted as percentage rather than absolute number.