Separately, Heathrow Express and Transport for London trains between the airport and London Paddington are heavily disrupted because of Network Rail carrying out “urgent repairs to the track between Hayes & Harlington and London Paddington”.
It appears that there is a broken rail between Ealing Broadway and West Ealing, and while engineers are working to repair the damage trains on the other lines which would normally be travelling at over 100mph are being slowed to a crawl for safety reasons.
Passengers are being warned: “Trains may be cancelled, delayed or amended to not call at all stations.”
Long-distance services are being affected. Two trains from Swansea, Cardiff and Newport are arriving over an hour late, and the early arrival from Plymouth and Exeter has been cancelled.