M4 Slough: lanes reopen after crash causes major disruption

Update 12pm November 5: Royal Berkshire Fire and Rescue Service (RBFRS) has provided a statement following a car crash involving multiple vehicles on the M4 near Slough yesterday evening. 

The service said three people were given emergency care at the scene, and were transferred to ambulances. Four vehicles were involved in the crash, which happened just before rush hour. 

Firefighters from Slough, Langley and London were sent to the scene, RBFRS added. 

A spokesperson said: "At 4:57pm on Tuesday, 4 November, we received reports of a road traffic collision on the M4 Westbound between Junction 5 in Langley and Junction 6 in Slough Central.

 "Royal Berkshire Fire and Rescue Service crews from Langley and Slough fire stations were sent to the scene. One crew from London Fire Brigade was also sent to the scene.

"Upon arrival, crews found a road traffic collision involving four cars with no people trapped. One person was placed in the care of South Central Ambulance Service.

"Crews gave immediate emergency care to two other people, before placing them in the care of South Central Ambulance Service.

"The scene was handed over to Thames Valley Police and National Highways.

 "They were on scene for approximately two hours and eight minutes."

Update 8pm: All lanes have reopened on the M4 westbound following a major crash near Slough earlier today. 

National Highways said long delays still remain on the affected motorway, between junctions 5 and 6, with around two miles of congestion.

This incident is now clear, and all lanes have re-opened on the #M4 westbound in #Berkshire between J5 and J6 (#Slough).

A 25 minute delay and 2 miles of congestion remains in the area but should now start to ease. pic.twitter.com/O3FGja7OQn

— National Highways: East (@HighwaysEAST) November 4, 2025

Update 6.55pm: There are up to one and a half hours of delays on the M4 near Slough while emergency services respond to a crash involving multiple vehicles. 

Traffic England's travel map displayed traffic as 'not moving', and warned drivers that delays were expected to continue until at least 8.45pm this evening. 

Two lanes remain closed on the M4 westbound between junctions 5 and 6, following the crash which happened at around 5pm. 

M4 drivers have been warned to expect delays after a multi-vehicle crash near Slough this afternoon (November 4). 

National Highways has said two lanes of the westbound section of motorway, between junctions 5 and 6, are closed while emergency services attend the crash.

There are up to 20 minutes of delays on the affected motorway section, while Traffic England's travel map said normal road conditions were expected to return by 6.15pm. 

Firefighters from Slough Fire Station have been called to the scene. 

2 lanes (of 4) are closed on the #M4 westbound in #Berkshire between J5 and J6 (#Slough) due to a multi-vehicle collision.

Emergency services are already in attendance, with our Traffic Officers en-route.

There's a 20 minute delay on approach so allow extra journey time. pic.twitter.com/seXERCJaoQ

— National Highways: East (@HighwaysEAST) November 4, 2025