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The M1 in Greater London is closed southbound between J4 (near Borehamwood) and J1 (near Wembley) for a police led incident
The M1 in Greater London is closed southbound between J4 (near Borehamwood) and J1 (near Wembley) for a police led incident
The M1 in Greater London is closed southbound between J4 (near Borehamwood) and J1 (near Wembley) for a police led incident
⏱ Still active — no changes from National Highways. Incident ongoing for 43 minutes. Monitoring continues.
The M1 in Greater London is closed southbound between J4 (near Borehamwood) and J1 (near Wembley) for a police led incident
⏱ Still active — no changes from National Highways. Incident ongoing for 1h 23m. Monitoring continues.
The M1 in Greater London is closed southbound between J4 (near Borehamwood) and J1 (near Wembley) for a police led incident
⏱ Still active — no changes from National Highways. Incident ongoing for 1h 58m. Monitoring continues.
The M1 in Greater London is closed southbound between J4 (near Borehamwood) and J1 (near Wembley) for a police led incident
✅ Incident cleared — M1 reopened at 23:16 on 17 Aug 2026. Total disruption: 2h 8m. All lanes open, traffic returning to normal.
The M1 in Greater London is closed southbound between J4 (near Borehamwood) and J1 (near Wembley) for a police led incident
Wording as published by National Highways, recorded as it changed.
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