Mr Johnson, Mr Hendy and Mr Haines all appeared at Hayes and Harlington station this morning to mark the new deal. The pay-as-you-go system is currently accepted on London Overground, Chiltern and c2c services, Hackney stations on National Express East Anglia network and Clapham Junction to Watford services on Southern. Next year, South West Trains, which operates out of Waterloo, must accept Oyster under the terms of its new franchise.