Indeed - there's a bit more detail now on
FGW▸ JourneyCheck:
Line problem: between London Paddington and Slough
Owing to emergency engineering works between London Paddington and Slough some lines are closed.
Train services running through these stations may be cancelled or delayed by up to 15 mins at short notice. Disruption is expected until 16:00 03/11.
Two out of the four running lines in the West Drayton area are closed as a result of this emergency engineering work.
In order to provide a service with the least disruption for our customers it has proved necessary to reduce the number of train movements through the affected area which may result in extended journey times.