In that report, Bradford might be classed as the main culprit, but rest assured, the problem is nationwide, hence the increase of hit and run.
A few years ago, uninsured drivers were stopped by curiousity more than anything. Failure to produce documents, usually meant a visit to the police station of the drivers choosing, and the driver was then free to go. The same applied to the Guinness label tax disc driver. Nowadays things have changed by roadside enforcement, but this is still not preventing the courts giving further bans to already banned drivers. The law wants further procedures to stem the problem totally.