Crime - how much does it cost? About £400 per Londoner, apparently. This is the claim made by the TaxPayers' Alliance. The group, dedicated to "campaigning for lower taxes and better government", has divined this sum by taking Home Office and police data on the economic and social costs of crime, then factoring in criminal justice system bills and adding "security measures, physical and emotional costs." Dividing this total - some £3bn - by......