COMMUTERS using a major railway line are suffering severe disruption because of a signalling failure.
Services between London Paddington and Reading are suspended due to a fault in Berkshire, Great Western Railway (GWR) said.
Some GWR trains are being re-routed to London Waterloo.
Ticket holders are able to use South Western Railway services on some routes.
Transport for London (TfL) said it is unable to run Elizabeth line trains between Maidenhead and Reading because of the signalling issue.
Disruption is expected to continue until 11am on Wednesday.