Train travel between Heathrow and central London continues to be disrupted after an overhead power line failure affected mourners attending the Queen’s funeral on Monday.
Heathrow Express earlier said that there would be no services in either direction today (Tuesday) with passengers advised to seek alternative travel methods to and from the airport.
However, trains resumed with a reduced frequency of two departures an hour in each direction before midday.
Elizabeth Line services to Heathrow were also hit together with Great Western Railway services from London Paddington station to the west country and Wales.
Network Rail warned of “major disruption” until midday due to damaged overhead wires at Hayes & Harlington affecting all services.
“Passengers are strongly advised only to travel if necessary and to please check before you travel,” Network Rail said.
Destinations affected alongside Heathrow included Cardiff, Cheltenham, Bristol, Newbury, Reading, Oxford, Penzance and Swansea.
Travellers to and from Heathrow had been urged to use the Piccadilly Line on the London Underground or buses.