There are still delays of up to 40 minutes on Greater Anglia services between Liverpool Street and: Norwich, Colchester, Southend Victoria and Shenfield due to the late finish of engineering work.
Tickets are being accepted on C2C, London Underground and buses.
A Network Rail spokesperson said:
“Network Rail would like to apologise to anyone who was delayed on their journeys this morning because of late-finishing engineering work between Ilford and Romford. Two of the four lines were in operation from the start of service, with all lines open by 7.20am.”