The works will affect trains on Saturday and Sunday (February 21 and February 22).
Dartford, Stone Crossing, Greenhithe for Bluewater, Swanscombe and Northfleet stations will be closed and served only by replacement buses.
Replacement buses will run between Slade Green and Gravesend (all stations), and Barnehurst and Crayford and Dartford (all stations).
Saturday (February 21)
Woolwich line:
Trains from London Cannon Street to Dartford via Lewisham and Woolwich Arsenal will run to Barnehurst.
Trains from Dartford to London Cannon Street via Woolwich Arsenal and Lewisham will start at Slade Green.
Trains between London Cannon Street and Slade Green via Greenwich and Woolwich Arsenal will run, but London-bound services will run at different times.
Bexleyheath line:
Trains from London Cannon Street to Slade Green via Bexleyheath will run only to Crayford.
Trains from Slade Green to London Cannon Street via Bexleyheath will run normally.
Services from London Victoria to Dartford will run between London Victoria and Slade Green.
Trains towards London Victoria will run only between Barnehurst and Victoria.
Trains between London Charing Cross and Dartford via Bexleyheath will run to and from Crayford every 30 minutes, starting from Barnehurst towards London.
Sidcup line:
Trains from London Charing Cross to Gravesend will run between London Charing Cross and Slade Green via Sidcup.
Trains from Gravesend to London Charing Cross via Sidcup will start at Crayford.
Trains from London Charing Cross to Dartford via Sidcup will run between London Charing Cross and Barnehurst.
Trains from Dartford to London Charing Cross via Sidcup will start at Crayford.
Sunday (February 22)
Woolwich line:
Trains between London Cannon Street and Slade Green via Greenwich and Woolwich Arsenal will run and extend to Barnehurst.
London-bound trains will run at different times than usual.
Bexleyheath line:
Trains from London Cannon Street to Slade Green via Bexleyheath will run only to Crayford.
Services from London Victoria to Dartford will run between London Victoria and Slade Green.
Trains towards London Victoria will run only between Barnehurst and Victoria.
Trains from Slade Green to London Cannon Street via Bexleyheath will start at Barnehurst.
Sidcup line:
No trains will run between London Charing Cross and Gravesend via Sidcup.
Trains from London Charing Cross to Dartford will run between London Charing Cross and Barnehurst.
Trains from Dartford to London Charing Cross will start at Crayford.
Engineering work is taking place between Herne Hill and Swanley, closing some lines.
Replacement buses will run between Beckenham Junction and Orpington.
The following stations will be closed all day and will only be served by replacement buses Shortlands, Bromley South, and Bickley stations.
Trains between London Victoria and Orpington will only run between London Victoria and Beckenham Junction.
Trains between London Victoria and Ashford International via Maidstone East will be diverted to run non-stop between London Victoria and St Mary Cray.
