M4 traffic LIVE: Motorway closed after 'massive crash' between two lorries near Heathrow

The M4 has been closed after a multi-vehicle crash involving two lorries, as drivers are warned of long delays. Three out of four lanes are closed westbound between junctions J7 (Slough) and J8 (Maidenhead) after two HGVs collided near Slough at 11am.

Drivers have been warned they face 30-minute delays and three miles of congestion as emergency services deal with the incident. Fire engines can be seen on the carriageway, as all but one lane remains closed.

FOLLOW OUR LIVE BLOG BELOW FOR UPDATES.