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The M23 in Surrey is closed southbound between J8 (near Merstham) and J10 (Crawley) due to a serious road traffic collision. 
The M23 in Surrey is closed southbound between J9 (London Gatwick Airport) and J10 (Crawley) due to a serious collision.
The M23 in Surrey is closed southbound between J9 (London Gatwick Airport) and J10 (Crawley) due to a serious collision.
⏱ Still active — no changes from National Highways. Incident ongoing for 35 minutes. Monitoring continues.
The M23 in Surrey is closed southbound between J9 (London Gatwick Airport) and J10 (Crawley) due to a serious collision.
⏱ Still active — no changes from National Highways. Incident ongoing for 1h 10m. Monitoring continues.
The M23 in Surrey is closed southbound between J9 (London Gatwick Airport) and J10 (Crawley) due to a serious collision.
The M23 in Surrey is closed southbound between J8 (near Merstham ) and J10 (Crawley) due to a serious collision. 
⏱ Still active — no changes from National Highways. Incident ongoing for 1h 55m. Monitoring continues.
The M23 in Surrey is closed southbound between J8 (near Merstham ) and J10 (Crawley) due to a serious collision. 
⏱ Still active — no changes from National Highways. Incident ongoing for 2h 30m. Monitoring continues.
The M23 in Surrey is closed southbound between J8 (near Merstham ) and J10 (Crawley) due to a serious collision. 
⏱ Still active — no changes from National Highways. Incident ongoing for 3h 5m. Monitoring continues.
The M23 in Surrey is closed southbound between J8 (near Merstham ) and J10 (Crawley) due to a serious collision. 
⏱ Still active — no changes from National Highways. Incident ongoing for 3h 40m. Monitoring continues.
The M23 in Surrey is closed southbound between J8 (near Merstham ) and J10 (Crawley) due to a serious collision. 
⏱ Still active — no changes from National Highways. Incident ongoing for 4h 20m. Monitoring continues.
The M23 in Surrey is closed southbound between J8 (near Merstham ) and J10 (Crawley) due to a serious collision. 
⏱ Still active — no changes from National Highways. Incident ongoing for 4h 55m. Monitoring continues.
The M23 in Surrey is closed southbound between J8 (near Merstham) and J10 (Crawley) due to a serious road traffic collision. 
⏱ Still active — no changes from National Highways. Incident ongoing for 5h 35m. Monitoring continues.
The M23 in Surrey is closed southbound between J8 (near Merstham) and J10 (Crawley) due to a serious road traffic collision. 
⏱ Still active — no changes from National Highways. Incident ongoing for 6h 10m. Monitoring continues.
The M23 in Surrey is closed southbound between J8 (near Merstham) and J10 (Crawley) due to a serious road traffic collision. 
⏱ Still active — no changes from National Highways. Incident ongoing for 6h 45m. Monitoring continues.
The M23 in Surrey is closed southbound between J8 (near Merstham) and J10 (Crawley) due to a serious road traffic collision. 
⏱ Still active — no changes from National Highways. Incident ongoing for 7h 25m. Monitoring continues.
The M23 in Surrey is closed southbound between J8 (near Merstham) and J10 (Crawley) due to a serious road traffic collision. 
⏱ Still active — no changes from National Highways. Incident ongoing for 8h 0m. Monitoring continues.
The M23 in Surrey is closed southbound between J8 (near Merstham) and J10 (Crawley) due to a serious road traffic collision. 
⏱ Still active — no changes from National Highways. Incident ongoing for 8h 35m. Monitoring continues.
The M23 in Surrey is closed southbound between J8 (near Merstham) and J10 (Crawley) due to a serious road traffic collision. 
⏱ Still active — no changes from National Highways. Incident ongoing for 9h 10m. Monitoring continues.
The M23 in Surrey is closed southbound between J8 (near Merstham) and J10 (Crawley) due to a serious road traffic collision. 
⏱ Still active — no changes from National Highways. Incident ongoing for 9h 50m. Monitoring continues.
The M23 in Surrey is closed southbound between J8 (near Merstham) and J10 (Crawley) due to a serious road traffic collision. 
⏱ Still active — no changes from National Highways. Incident ongoing for 10h 25m. Monitoring continues.
The M23 in Surrey is closed southbound between J8 (near Merstham) and J10 (Crawley) due to a serious road traffic collision. 
⏱ Still active — no changes from National Highways. Incident ongoing for 11h 5m. Monitoring continues.
The M23 in Surrey is closed southbound between J8 (near Merstham) and J10 (Crawley) due to a serious road traffic collision. 
⏱ Still active — no changes from National Highways. Incident ongoing for 11h 40m. Monitoring continues.
The M23 in Surrey is closed southbound between J8 (near Merstham) and J10 (Crawley) due to a serious road traffic collision. 
⏱ Still active — no changes from National Highways. Incident ongoing for 12h 15m. Monitoring continues.
The M23 in Surrey is closed southbound between J8 (near Merstham) and J10 (Crawley) due to a serious road traffic collision. 
⏱ Still active — no changes from National Highways. Incident ongoing for 12h 50m. Monitoring continues.
The M23 in Surrey is closed southbound between J8 (near Merstham) and J10 (Crawley) due to a serious road traffic collision. 
✅ Incident cleared — M23 reopened at 15:20 on 8 Jul 2026. Total disruption: 13h 10m. All lanes open, traffic returning to normal.
The M23 in Surrey is closed southbound between J8 (near Merstham) and J10 (Crawley) due to a serious road traffic collision. 
Wording as published by National Highways, recorded as it changed.
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