Trains on all three of c2c's lines across east London and Essex are facing disruptions and rerouting all week.
Disruption to late night trains will last from today (November 10) to Thursday (November 12) before more significant changes take place across the weekend (Saturday, November 14 and Sunday, November 15).
Ongoing works at Limehouse also mean Londonbound trains will not stop at the station throughout the week.
From Tuesday to Thursday, engineering work from 12.40am between Pitsea and Shoeburyness will cause late-night Basildon and Ockendon line services to terminate early.
On Tuesday, the last Fenchurch Street to Shoeburyness service via Basildon will leave at 11.05pm, while on Wednesday and Thursday the final train will leave at 11.15pm.
The 11.34pm service will terminate at Leigh-on-Sea, while the 12.04am and 12.34am services will terminate at Pitsea.
Rail replacement transport will be provided, according to c2c's website.
On the Ockendon line, the last service to Shoeburyness will leave Fenchurch Street at 10.41pm.
The 11.09pm train will terminate at Southend Central, while the 11.41pm and 12.11am services will terminate at Pitsea.
On following mornings, the 3.59am Thorpe Bay to Fenchurch Street service will start at Stanford-le-Hope, with a replacement bus leaving Thorpe Bay at 3.15am.
Further engineering work between Fenchurch Street and Barking will cause major changes across the weekend.
Basildon line services will be diverted to Liverpool Street, calling at Stratford but not Limehouse or West Ham.
Ockendon services will operate as shuttles between Upminster and Grays, with passengers advised to change at either station for trains towards London or Southend.
Rainham line services will also be diverted to Liverpool Street via Stratford, missing Limehouse and West Ham, and will be extended to Southend Central.
Tickets will be accepted on specified District, Jubilee and DLR routes.
Whilst some works will conclude after Saturday, some will continue into Sunday and cause further disruption.
Basildon and Ockendon line services will start and terminate at Upminster, without serving Barking or stations closer to central London.
Passengers can use the District line between Tower Hill, West Ham, Barking and Upminster, as well as specified DLR services.
Holders of c2c season tickets can also use Greater Anglia services between Southend Victoria and Liverpool Street, including Romford for journeys to and from Upminster.
There will be no Rainham line train service on Sunday, with rail replacement transport running between Upminster, Rainham, Purfleet and Grays.
Passengers using Dagenham Dock can instead use the EL2 and 287 TfL bus services.
Separately, ongoing platform works mean London-bound trains will not call at Limehouse until November 22, although Southend and Grays-bound services will continue to stop there.
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