Tagging firms 'overcharging' probed

Justice Secretary Chris Grayling has asked the Serious Fraud Office to investigate G4S and Serco for overcharging for tagging criminals in England and Wales.

MPs heard that the overcharging by G4S and rival Serco ran to tens of millions of pounds.

Mr Grayling said the firms charged the government for tagging people who were not actually being monitored.