Serco Group plc is a British outsourcing company based in Hook, Hampshire. It operates public and private transport and traffic control, aviation, military weapons, detention centres, prisons and schools on behalf of its customers. There has been a history of problems, failures, fatal errors and overcharging.tarting in 2004 Serco had a £5m a year contract from the US government to manage airports in Iraq for 18 months. Serco also operate Scatsta Airport on Shetland. In June 2010 Serco signed a £4 million contract to operate all air traffic control services for Coventry Airport.