All lines will be blocked between Liverpool Street and Ingatestone / Billericay.
Mainline and Southend routes will operate to a revised Saturday service, with additional early morning trains.
Customers travelling from Norwich, Ipswich, Clacton, Colchester and branches to London should change at Witham on to rail replacement bus services directly to Stansted Airport, and then use Stansted Express trains from Stansted Airport to London Liverpool Street.
Customers travelling from Hatfield Peverel, Chelmsford and Ingatestone to London should use the rail replacement bus service provided from Ingatestone to Newbury Park Central Line train station, where tickets will be accepted on the Central Line to Stratford / London Liverpool Street. A rail replacement bus service will also operate between Ingatestone and Shenfield.
Trains from Southend Victoria will terminate at Billericay, with rail replacement bus services from Billericay to Newbury Park Central Line train station (via Shenfield), where tickets will be accepted on the Central Line to Stratford / London Liverpool Street.
For customers travelling from Colchester, Ipswich, Norwich and branches to destinations on the Southend or Southminster branch, please change at Chelmsford on to First Bus Route 100 services that operate between Chelmsford and Billericay. First are operating a normal Saturday service on Route 100 services between Chelmsford and Billericay, please click here for a link to the timetable. National Rail tickets will be accepted on this route all day.