On an overcast Friday evening on a rundown suburban street in Boston, Lincolnshire, a part-time plumber and a retired policeman are sitting in a large white van outside a cell-block, waiting to hear from the police. In black bulletproof vests, smart black trousers and white shirts, they look like police officers. But their van is emblazoned with the words “G4S – working with local policing” and the epaulettes on their uniforms carry the red, white and black logo of the private security company above that of Lincolnshire Police.

This is the frontline of part-privatised policing, where police officers still make the arrests but G4S staff go to the scene, drive offenders away, and later process them for fingerprints and other paperwork in the company’s own “custody suites”. “We tell offenders we are just a taxi service,” says Julian Davis, the ex-policeman on duty for  G4S. “It helps defuse the tension    Read more.”