In the UK there are the ‘big four’: Atos and G4S are the biggest in terms of revenue (around £7 billion each), Serco (£5 billion) followed by Capita (£3 billion). This ranking changes when looking at...

In the UK there are the ‘big four’: Atos and G4S are the biggest in terms of revenue (around £7 billion each), Serco (£5 billion) followed by Capita (£3 billion). This ranking changes when looking at revenue from the UK government.