TWO lanes are closed on the M4 westbound this evening (Thursday, March 14) due to an overturned vehicle.

Lanes two and three are currently shut between junction 18 (Tormarton Interchange) to junction 19 while the incident is dealt with.

Emergency services are at the scene.

Traffic is now queuing back for about one mile. 

It is expected to return to normal by 11.15pm.