The M4 is closed westbound after a crash involving two vans and a car.
The crash, which saw one van overturned, happened earlier this morning between J16 and J17 of the M4.
Police were holding traffic in both directions until around 7.15am, while traffic officers cleared debris from the road.
Drivers heading west face delays of about an hour-and-a-half and those heading east of about 60 minutes.
- The M4 westbound is now open between junctions 16 and 17 but traffic int the area is still severely delayed.
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