Delays of up to 45 minutes on Southern Trains between Clapham Junction and Milton Keynes Central due to earlier faulty train at Willesden Junction.
Tickets being accepted on c2c, First Capital Connect, First Great Western, Greater Anglia, Southeastern, South West Trains, DLR, London Underground and local bus services.
Abellio, who run the Greater Anglia rail line, has been named Train Operator of the Year at the annual national Rail Business Awards.
Greater Anglia train operator Abellio says it's made real steps in customer service and punctuality in its first year in charge.
Greater Anglia have apologised for the delays that have disrupted services today