M1 crash J21–J21A southbound

Crash on the M1 southbound at J21–J21A on Saturday 24 October 2026, from 15:28. Cleared at 16:59 after 1 h 31 min. Timeline of reports from TomTom and the motorway signs.

Status

Cleared 16:59 on 24 Oct 2026, after 1 h 31 min

Location

M1 southbound · J21–J21A

Reported as

Collision

At its worst

Stationary traffic · delay ~29 min

Sources

TomTom · Motorway signs

Timeline

1. Sat 15:28 Motorway signs: “COLLISION SLOW DOWN”
2. Sat 15:40 TomTom: queueing traffic, “Stationary traffic”, delay ~9 min
3. Sat 15:58 TomTom: delay now ~21 min (was ~13)
4. Sat 16:03 TomTom: delay now ~14 min (was ~21)
5. Sat 16:08 TomTom: now says collision, “Stationary traffic, Accident”
6. Sat 16:12 TomTom: delay now ~22 min (was ~16)
7. Sat 16:17 TomTom: delay now ~29 min (was ~22)
8. Sat 16:44 TomTom: now says queueing traffic, “Stationary traffic”
9. Sat 16:49 TomTom: now says collision, delay now ~12 min (was ~18), “Stationary traffic, Accident”
10. Sat 16:53 TomTom: delay now ~3 min (was ~12), “Slow traffic, Accident”
11. Sat 16:58 TomTom no longer reports it
12. Sat 16:59 Motorway signs no longer show “COLLISION SLOW DOWN”
13. Sat 16:59 All clear: no source reports it any more

Source reports

• Slow traffic, Accident
• Overhead signs read “COLLISION SLOW DOWN” (2 signs; furthest along: M1 southbound between J21A 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 J21 and M1 J21A.

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