The Southeastern trains will be affected on Sunday (September 21) only.
Trains will run as normal on Saturday (September 20).
We’ve broken down the details so you can plan ahead.
Sunday (September 21):
Engineering work is taking place between Ladywell and Hayes, closing some lines.
Trains between London Charing Cross and Hayes will be diverted after Lewisham to run to and from Orpington via Grove Park.
Lewisham and Hayes calling at all stations and additionally at Beckenham Junction.
Engineering work is also taking place overnight in the Dartford area, closing some lines.
The 12.30am train from London Charing Cross to Gravesend via Sidcup service will be replaced by a bus between Dartford and Gravesend.
This bus will be a Thameslink service which runs to Gillingham, and passengers can use this bus at no extra cost.
The 6.50am train from Dartford to London Charing Cross via Sidcup train will start from Crayford.
A bus will run between Dartford and Crayford, leaving Dartford at 6.35am.
The 7.02am train from Dartford to London Victoria train will start at Barnehurst.
A replacement bus will leave Dartford at 6.50am, calling at Barnehurst.