Trains going in and out of London Paddington have been either cancelled or held at red signals after the lines were closed due to a major incident.
It is understood that a person fell from a bridge at West Ealing while emergency services are now in attendance.
Transport for London (TfL) stated that the incident resulted in a fatality on the track.
According to Great Western Railway (GWR), train services between London Paddington and Bristol Temple Meads are being cancelled, delayed or revised as the lines have been blocked.
The issues have also affected services between Paddington and Reading and Heathrow Airport on the Elizabeth Line with delays between Paddington and Abbey Wood “while emergency services deal with a casualty on the track”.
One driver has updated passengers on a train held at a red signal that the British Transport Police are currently on site, and will be advising GWR headquarters.
The latest updated on GWR social accounts state that disruptions are expected until 10am at the earliest.
The story will be updated when more information becomes available