Local police have tweeted that Sipson Road and Cherry Lane is closed in both directions.
Transport for London says there has been a collision on Cherry Lane, and the 222 bus is running on a diversion.
We will be bringing you all the very latest updates, pictures and video on this breaking news story as it develops.
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As we bring our blog to a close, head to our article below for all of the latest information:
'An 89 year old male had been struck by a vehicle'
London Ambulance Service called for police assistance at around 2.20pm following the collision on Cherry Lane in West Drayton.
A spokesman from Hillingdon Police said:
An 89 year old male had been struck by a vehicle.
The patient was taken to St Mary’s suffering from a head injury.
The driver stopped at the scene and is assisting police with their investigation.
The road was closed for around an hour to allow paramedics and police to work.
Confirmation of road reopening
So TfL’s tweet suggests the road is returning to normal following an incident.
We’ll bring you details from the Met when we have it.
222 resumes normal service
Grand Union Canal incident blog
We have been following the incident at Grand Union Canal throughout the day.
Click here to see our live blog.
Met Police contacted
getwestlondon has contacted the Met and is for further information.
We’ll let you know as soon as we have it.
Local police in Hayes tweeted this:
Buses being diverted
First TfL posted this: