M1 crash J20–J21 northbound

Crash on the M1 northbound at J20–J21 on Saturday 24 October 2026, from 12:21. Cleared at 14:39 after 2 h 18 min. Timeline of reports from TomTom and the motorway signs.

Status

Cleared 14:39 on 24 Oct 2026, after 2 h 18 min

Location

M1 northbound · J20–J21

Reported as

Collision

At its worst

Delay ~7 min

Sources

TomTom ×2 · Motorway signs ×2

Timeline

1. Sat 12:21 TomTom: queueing traffic, “Queuing traffic”, delay ~6 min
2. Sat 12:40 TomTom: “Slow traffic”
3. Sat 12:58 TomTom no longer reports it
4. Sat 12:58 All clear: no source reports it any more
5. Sat 13:21 TomTom: queueing traffic, “Slow traffic”, delay ~4 min
6. Sat 13:26 Motorway signs: “COLLISION SLOW DOWN”
7. Sat 13:35 TomTom: “Queuing traffic”
8. Sat 13:58 TomTom: “Slow traffic”
9. Sat 14:07 TomTom no longer reports it
10. Sat 14:09 Motorway signs no longer show “COLLISION SLOW DOWN”
11. Sat 14:39 Motorway signs no longer show “COLLISION SLOW DOWN”
12. Sat 14:39 All clear: no source reports it any more

Source reports

• Slow traffic
• Overhead signs read “COLLISION SLOW DOWN” (2 signs; furthest along: M1 northbound between J20 and J21).

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 J20 and M1 J21.

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