M1 crash J21–J20 southbound

Crash on the M1 southbound at J21–J20 on Sunday 1 November 2026, from 20:32. Cleared at 21:46 after 1 h 14 min. Timeline of reports from the motorway signs and TomTom.

Status

Cleared 21:46 on 1 Nov 2026, after 1 h 14 min

Location

M1 southbound · J21–J20

Reported as

Collision

Sources

Motorway signs ×2 · TomTom

Timeline

1. Sun 20:32 Motorway signs: “REPORT OF COLLISION”
2. Sun 20:44 Motorway signs: “COLLISION SLOW DOWN”
3. Sun 21:13 TomTom: queueing traffic, “Queuing traffic”, delay ~4 min
4. Sun 21:16 Motorway signs no longer show “REPORT OF COLLISION”
5. Sun 21:18 TomTom no longer reports it
6. Sun 21:46 Motorway signs no longer show “COLLISION SLOW DOWN”
7. Sun 21:46 All clear: no source reports it any more

Source reports

• Overhead signs read “REPORT OF COLLISION” (10 signs; furthest along: M1 southbound between J21 and J20).
• Queuing traffic
• Overhead signs read “COLLISION SLOW DOWN” (4 signs; furthest along: M1 southbound between J21 and J20).

Other recent incidents on the M1

• M1 crash J42–J43 northboundyesterday 22:32 · cleared after 1 h 21 min
• M1 crash J43–J42 southboundyesterday 20:39 · cleared after 1 h 44 min
• M1 crash J9–J10 northboundyesterday 19:33 · cleared after 49 min
• M1 crash J17–J16 southboundyesterday 15:34 · cleared after 47 min
• M1 crash J34 northboundyesterday 15:09 · cleared after 42 min
• M1 crash J22–J23 northboundyesterday 14:46 · cleared after 47 min
• M1 crash J20–J21 northboundyesterday 12:30 · cleared after 2 h 51 min
• M1 crash J37–J36 southboundyesterday 08:35 · cleared after 44 min
• M1 stopped traffic J32–J33 northboundyesterday 07:33 · cleared after 1 h 16 min
• M1 crash J8–J9 northboundyesterday 06:00 · cleared after 3 h 31 min

Live traffic and past incidents at M1 J21 and M1 J20.

The sources don't report causes or injuries, so neither does this page. Times are UK time. For alerts, follow @motorways.me on Bluesky.