Location : The M4 westbound exit slip at junction J20 .
Lane Closures : Lanes 1, 2 and 3 will be closed.
Reason : Roadside drains works are planned.
Status : Pending.
Schedule : Expect disruption everyday between 21:00 and 06:00 from 22 June 2026 to 24 June 2026.
Lanes Closed : All lanes will be closed.
