The lines between Portsmouth & Southsea and Portsmouth Harbour will be closed Sunday until mid afternoon.
Until mid morning on Sunday, all lines in the Portsmouth area, except the line between Cosham and Havant, will be closed.
Until mid-morning Sunday, trains will run to Havant instead of to Portsmouth. Bus services will run between Havant and Portsmouth, also between Cosham and Portsmouth.
From mid morning to mid afternoon Sunday, buses will run between Portsmouth & Southsea and Portsmouth Harbour. Most trains will run to and from Portsmouth & Southsea but due to limited platform space there, some trains will only run to and from Fratton.
This work will also affect Southern and Great Western Railway services in this area. Please see their publicity for details.