Trains to and from Heathrow Airport have been suspended today due to an issue with the tunnel ventilation system.
Trains are being cancelled or revised, with major disruption expected until the end of the day.
Elizabeth Line trains are suspended between Heathrow Airport and Hayes and Harlington, with services between Heathrow Terminal 5 and Shenfield running between London Paddington and Shenfield only.
Passengers can use London Underground or London Buses to complete their journey alongside local buses to Ealing Broadway, Southall and Hayes and Harlington to connect with Great Western Railway trains.
Heathrow Express passengers can use London Underground Piccadilly Line services, London Buses or Elizabeth Line services to complete their journey.
You can check the latest travel advice over on National Rail Enquiries.
