Engineering work is taking place at various locations between London St Pancras International and Luton Airport Parkway, closing some lines throughout the day.
Engineering work is taking place between London Paddington and Hayes & Harlington on Sunday, closing all lines from 09:00 until 23:00.
A fault with the signalling system in the Southall area is causing disruption to trains between London Paddington and Hayes & Harlington.
A fault with the signalling system at Hanwell is causing disruption to TfL Rail services between London Paddington and Hayes & Harlington.
Engineering work is taking place in the Didcot Parkway area, closing some lines.
Saturday
Didcot Parkway
Engineering work is taking place between London St Pancra International and Luton Airport Parkway, closing some lines.
AÂ fault with the signalling system at Birmingham Snow Hill is disruptimng some trains running through the station.
Engineering work is taking place between London St Pancras International and Luton and also between Loughborough and Leicester, closing some lines.
Engineering work is taking place between London Liverpool Street and Shenfield, closing some lines.
Engineering work is taking place between London Paddington and Heathrow, closing some lines early on Sunday morning.
The following trains will not run: