BRITAIN’S most senior policeman Sir Ian Blair is facing a race relations dilemma after the release of figures that reveal almost half the number of people arrested in relation to car crime in London are black. Blair, the Metropolitan police commissioner, has signed off a report by his force’s traffic unit which shows that black people account for 46% of all arrests generated by new automatic numberplate recognition (ANPR) cameras. The technology allows car registration plates to be scanned and automatically run through databases to determine whether a vehicle is stolen, uninsured or has not had its road tax paid....