M1 crash J21 northbound

Crash on the M1 northbound at J21 on Tuesday 27 October 2026, from 07:32. Cleared at 09:35 after 2 h 2 min. Timeline of reports from the motorway signs and TomTom.

Status

Cleared 09:35 on 27 Oct 2026, after 2 h 2 min

Location

M1 northbound · J21

Reported as

Collision

Sources

Motorway signs · TomTom ×2

Timeline

1. Tue 07:32 Motorway signs: “REPORT OF COLLISION”
2. Tue 08:03 TomTom: queueing traffic, “Slow traffic”, delay ~3 min
3. Tue 08:07 TomTom no longer reports it
4. Tue 08:12 TomTom: queueing traffic, “Slow traffic”, delay ~4 min (reported again)
5. Tue 08:21 TomTom no longer reports it
6. Tue 08:22 TomTom: queueing traffic, “Slow traffic”, delay ~4 min
7. Tue 08:30 Motorway signs no longer show “REPORT OF COLLISION”
8. Tue 08:35 TomTom no longer reports it
9. Tue 08:35 All clear: no source reports it any more
10. Tue 08:48 TomTom: queueing traffic, “Slow traffic”, delay ~3 min (reported again)
11. Tue 08:53 TomTom no longer reports it
12. Tue 08:53 All clear: no source reports it any more
13. Tue 09:22 TomTom: queueing traffic, “Stationary traffic”, delay ~10 min (reported again)
14. Tue 09:35 TomTom no longer reports it
15. Tue 09:35 All clear: no source reports it any more

Source reports

• Overhead signs read “REPORT OF COLLISION” (2 signs; furthest along: link road from M25 J21 to M1 J6A northbound).
• Slow traffic
• Stationary traffic

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.

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