A fire close to a prepare observe within the London Paddington space has brought on main disruption, with companies to Heathrow airport cancelled.
The fire brought on an electrical energy provide failure which has left all strains between Paddington and the airport blocked, National Rail stated.
Cancellations and delays to companies are anticipated till 7.15pm, it added.
Photos on social media present giant plumes of smoke rising from the Paddington space.
Great Western Railway (GWR) companies to Reading have been cancelled, whereas the Elizabeth line is part-suspended.
No trains are operating in both path between Paddington and Heathrow, the Heathrow Express stated.
The airport suggested passengers to go away additional time for his or her journeys, including that the Piccadilly line, which runs companies to the airport, can also be experiencing delays.
Transport for London (TfL) stated the Elizabeth line is suspended between Paddington and Heathrow terminals 4 and 5, and between Paddington and Reading, whereas the road to Abbey Wood is experiencing extreme delays.
There are extreme delays throughout all the Piccadilly line because of an earlier trespasser at Hammersmith, in keeping with the TfL web site.
GWR stated trains could also be cancelled, delayed or terminated at and began again from Reading, with disruption anticipated till 7pm.
The London fire brigade has been contacted for remark.