Some services will be diverted while some stations will not be called at, affecting journeys next weekend.
Be sure to check out alternative routes, taking note of shuttle services and rail replacements in place.
Monday May 12 to Saturday May 17
No planned engineering works.
Sunday May 18
The Basildon line will be impacted by engineering works between Liverpool Street and Barking, as well as between Leigh-on-Sea and Shoeburyness.
These services will start or terminate at Fenchurch Street and Leigh-on-Sea, calling at West Ham but not calling at Stratford.
Tickets will be accepted on the Jubilee line between Stratford and West Ham.
The Ockendon line will also be impacted by the engineering works. These services will start and terminate at Leigh-on-Sea.
A rail replacement bus will run between Leigh-on-Sea and Shoeburyness.
Passengers with monthly or longer season tickets may travel on Greater Anglia services between Southend Victoria and London Liverpool Street, including Romford for travel to and from Upminster.
