The Department for Transport and National Express East Anglia entered into a deed of amendment to the National Express East Anglia franchise agreement on 1 April 2009. As part of this agreement, from 14 December 2009, nine services a day between Chelmsford and London Liverpool Street have been extended by four carriages, providing essential new capacity during the morning and evening peaks on the Great Eastern main line.
In addition to this, additional and lengthened Great Eastern Mainline services are due to be introduced in December 2010 and May 2011. The precise calling pattern for these services is due to be finalised between National Express East Anglia and Network Rail in mid-March 2010.