We’re carrying out essential work to improve two bridges in the Portsmouth area in January 2021

Landport Viaduct
Landport viaduct

What we’re doing

As part of work to improve the railway’s reliability, we’re replacing a bridge in Cosham and strengthening a viaduct at Portsmouth & Southsea station.

Over four days in early January, engineers will replace the ageing railway bridge that crosses Cow Lane in Cosham and renew its track.

At Portsmouth & Southsea station, during a week-long line closure, engineers will strengthen spans on Landport Viaduct, which supports the station’s two platforms used for services to Portsmouth Harbour.

January 2021 line closures

Sections of the line from Fareham to Portsmouth Harbour will be closed at different times through January 2021 to complete our work.

Between Friday 1 and Sunday 3 January, then again on Sunday 17 January, the line between Fareham and Portsmouth Harbour will be closed. Buses will replace South Western Railway (SWR), Great Western Railway (GWR) and Southern services.

Between Monday 18 and Saturday 23 January, the line between Portsmouth & Southsea and Portsmouth Harbour will be closed. On Sunday 24 January this line closure will extend to Cosham and Bedhampton .

Rail replacement bus services will run between Portsmouth and Southsea and Portsmouth Harbour between Monday 18 and Saturday 24, and between Havant/Fareham and Portsmouth Harbour on Sunday 24.

South Western Railway (SWR), Great Western Railway (GWR) and Southern services will be altered as follows:

SWR

  • Services between Southampton Central, Basingstoke and Portsmouth Harbour will start and terminate at Fareham
  • Rail replacement bus services will operate between Fareham and Portsmouth Harbour

Southern

  • Services to Southampton Central will be diverted to Portsmouth & Southsea

GWR

  • Services between Cardiff Central and Portsmouth Harbour will start and terminate at Fareham
  • Rail replacement bus services will operate between Fareham and Portsmouth Harbour

SWR

  • Services between Southampton Central, Basingstoke and Portsmouth Harbour will start and terminate at Fareham. Services between London Waterloo, Guildford and Portsmouth Harbour will start and terminate at Fratton.
  • Rail replacement bus services will operate between Fareham, Fratton and Portsmouth Harbour

GWR

  • Services between Cardiff Central and Portsmouth Harbour will start and terminate at Fareham
  • Rail replacement bus services will operate between Fareham and Portsmouth Harbour

Southern

  • Services to Portsmouth Harbour and Southampton Central will start and terminate at Havant
  • Rail replacement bus services will operate between Chichester and Portsmouth Harbour

SWR

  • Services between London Waterloo and Portsmouth Harbour via Basingstoke will start and terminate at Fareham
  • Rail replacement bus services will operate between Fareham and Portsmouth Harbour

GWR

  • Services between Cardiff Central and Portsmouth Harbour will start and terminate at Fareham
  • Rail replacement bus services will operate between Havant and Portsmouth Harbour

Southern

  • Services to Southampton Central will divert to Portsmouth & Southsea
  • Rail replacement bus services will operate between Havant and Fareham

SWR

  • Services between London Waterloo and Portsmouth Harbour via Guildford will start and terminate at either Portsmouth & Southsea or Haslemere. Services towards Portsmouth will make additional stops
  • Services between London Waterloo and Portsmouth & Southsea via Guildford will start and terminate at Haslemere
  • Services between London Waterloo and Portsmouth Harbour via Fareham will start and terminate at Fratton
  • Services between Southampton Central and Portsmouth & Southsea will run to a slightly amended timetable

GWR

  • Services between Cardiff Central and Portsmouth Harbour will start and terminate at Portsmouth & Southsea. Trains travelling towards Portsmouth will run to a slightly amended timetable

Southern

  • Services between Littlehampton and Portsmouth & Southsea will run to a slightly amended timetable
  • Services between Brighton and Portsmouth Harbour will start and terminate at Portsmouth & Southsea and run to a slightly amended timetable
  • Services from London Victoria to Portsmouth Harbour will start at Portsmouth & Southsea
  • Services from Portsmouth Harbour to Horsham will start at Portsmouth & Southsea

SWR

  • Services from London Waterloo to Portsmouth Harbour via Guildford will terminate at Portsmouth & Southsea and run to a slightly amended timetable. Services leaving London Waterloo at 30 minutes past the hour will make additional stops
  • Services from Portsmouth Harbour to London Waterloo via Guildford will start from Portsmouth & Southsea and run to an amended timetable. These services will be diverted via Chertsey and either Twickenham or Brentford. Services leaving Portsmouth & Southsea at 24 minutes past the hour will make additional stops
  • Services between London Waterloo and Portsmouth Harbour via Fareham will start at Basingstoke and terminate at Fratton, and run to a slightly amended timetable
  • The hourly London Waterloo to Portsmouth & Southsea service will not run
  • Services between Southampton Central and Portsmouth Harbour will start and terminate at Fratton

GWR

  • Services between Cardiff Central and Portsmouth Harbour will start and terminate at Portsmouth & Southsea. Trains travelling toward Portsmouth will run to a slightly amended timetable

Southern

  • Services from Littlehampton to Portsmouth & Southsea will run to a slightly amended timetable
  • Services between Brighton and Portsmouth Harbour will start and terminate at Fratton. Trains travelling toward Brighton will run to an amended timetable
  • Services from London Victoria to Portsmouth Harbour will terminate at Portsmouth & Southsea
  • Services from Portsmouth Harbour to Horsham will start at Portsmouth & Southsea and run to an amended timetable

SWR

  • Services from London Waterloo to Portsmouth Harbour will terminate at Havant
  • Services from Portsmouth Harbour to London Waterloo will start at Havant
  • Services between Eastleigh and Portsmouth Harbour will terminate at Fareham
  • Services between Southampton Central and Portsmouth Harbour will start and terminate at Fareham, and run to amended timetable
  • Rail replacement bus services will operate from Fareham and Havant to Portsmouth Harbour

GWR

  • Services from Portsmouth Harbour to Cardiff Central will start and terminate at Fareham and run to an amended timetable
  • Rail replacement bus services will operate from Fareham to Portsmouth Harbour

Southern

  • All services will start and terminate at Chichester
  • Rail replacement bus services will operate from Chichester to Portsmouth Harbour

Future work

Between Monday 18 and Sunday 24 January engineers will strengthen 10 of Landport Viaduct’s 17 spans. The remaining seven spans will be strengthened at a later date in 2022 and will also require a line closure between Fratton/Portsmouth & Southsea and Portsmouth Harbour.

Details of future work will be published on this page.

Contact us

For more information or to get in touch with us, please contact us by visiting our contact us page or by calling our 24-hour national helpline on 03457 11 41 41.