A major stretch of the M4 between Berkshire and Wiltshire has been closed throughout the night due to a “serious” “police-led incident”.
National Highways revealed the stretch between junction 15, Swindon, and junction 14, Hungerford. The carriageway is closed in both directions.
The highways agency said Thames Valley Police was running a “mutli-agency response” to the incident. Although it has not revealed the nature of the closure.
A National Highways spokesman said: “At approximately 21:46 last night we were advised of a serious incident resulting in the closure of the M4 in both directions between J15 and J14.
“Thames Valley Police are leading a multi agency response to the incident. National Highways resources are providing assistance with traffic management.
“Due to the serious nature of the incident the road is expected to remain closed through the morning to facilitate the ongoing police collision investigations.”
According to traffic monitoring website INRIX, motorists were turned around at the scene last night. It says the road is currently closed due to “accident investigation work”.
M4 eastbound diversion
- Leave the M4 at J15. At the roundabout, take the 1st exit to join the A419.
- Continue to the next roundabout. Use the 4th exit and join the B4192. Follow for approx. 13 miles via Aldbourne.
- Avoiding Hungerford town centre; at the junction of the B4192 with Charnham Park, turn left and continue to the A4 roundabout.
- Take the 1st exit and take the 1st exit at the next roundabout joining the A338.
- Follow the A338 for approx. 3 miles to the M4 J14 and rejoin the M4 eastbound.
M4 westbound diversion
- Leave the M4 at J14. At the roundabout, take the first exit and join the A338
- Follow for approx. 3 miles
- At the A4 mini roundabout, turn right onto the A4 towards Hungerford avoiding Hungerford town centre.
- After a short distance to the next roundabout take the 2nd exit into Charnham Park.
- Turn right onto the B4192 and follow for approx. 13 miles through Aldbourne to the A419 roundabout.
- Take the first exit and join the A419, continue to rejoin the M4 westbound at J15.
