This is a developing story. Details are still emerging, and this article will be updated as more information becomes available. Follow the live updates below.
An emergency services incident is causing major disruption on the rail network, with rail lines closed.
The incident is affecting Heathrow rail services. Three operators are affected: the Elizabeth line, Great Western Railway and Heathrow Express.
Passengers travelling to and from Heathrow Airport by rail are facing major disruption while the incident is dealt with. The full extent of the disruption, and how long it will last, is not yet clear.
What is not yet known is the nature of the incident, its exact location, which stations are affected, or when services are expected to return to normal. No casualty details and no alternative-route information have been confirmed at this stage, and this article does not speculate on any of those points.
We will update this story as soon as the operators or emergency services confirm more details.
Heathrow’s wider transport picture has been in the spotlight this week. Earlier today we reported that Heathrow has the UK’s second-lowest rate of long flight delays, while the Elizabeth line faces a full 10-day closure over Christmas between Liverpool Street and Shenfield for engineering works.
