Two c2c trains per hour will run to London Liverpool Street instead of London Fenchurch Street. They will also call at Stratford.
They will provide direct access to the Westfield Stratford City shopping centre.
The diverted trains will run on the following dates and times: November 29, December 6 and 13, calling at Stratford between 0900 and 2000, with 23 services in each direction, and November 30, December 7 and 14, calling at Stratford between 1000 and 1900, with 18 trains in each direction
These trains will run to and from Shoeburyness via Laindon. Each train will be formed of a pair of Class 357s, with over 550 seats available.
c2c has also proposed permanently diverting two trains an hour to Liverpool Street at weekends from December 2015, as part of the plans for a new c2c timetable.