Traffic is queueing on the M1 southbound after an accident involving a lorry and a car at junction 15 (Towcester / Northampton Services).
A temporary speed limit of 40mph is in place. There are delays to Watford Gap 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