M1 crash J21A–J21 southbound

Cleared Cleared at 18:32 on 27 Sept 2026, after 40 min.

Crash on the M1 southbound at J21A–J21 on Sunday 27 September 2026, from 17:52. Cleared at 18:32 after 40 min. Timeline of reports from the motorway signs and TomTom.

1. !

   M1 southbound · J21A–J21

   Collision

   17:52–18:32 (cleared after 40 min) · delay ~3 min · queue 2.7 mi

   Motorway signs · TomTom

See the M1 on the live map M1 traffic now

Timeline

1. 17:52 Motorway signs: “COLLISION SLOW DOWN”
2. 18:05 TomTom: queueing traffic, “Queuing traffic”, delay ~6 min
3. 18:19 TomTom no longer reports it
4. 18:23 TomTom: queueing traffic, “Slow traffic”, delay ~3 min (reported again)
5. 18:28 TomTom no longer reports it
6. 18:32 Motorway signs no longer show “COLLISION SLOW DOWN”
7. 18:32 All clear: no source reports it any more

What the sources said

• Overhead signs read “COLLISION SLOW DOWN” (1 sign; furthest along: M1 southbound between J21A and J21).
• Slow traffic

Other recent incidents on the M1

• M1 crash J23A southbound · 11:26, cleared after 1 h 5 min
• M1 reported crash J20–J19 southbound · 00:22, cleared after 36 min
• M1 crash J6–J5 · yesterday 23:05, cleared after 51 min
• M1 closed J10–J11 northbound · yesterday 22:20, cleared after 1 h 38 min
• M1 stopped traffic J12–J11A · yesterday 22:11, cleared after 1 h 59 min
• M1 crash J22–J21A southbound · yesterday 15:12, cleared after 1 h 6 min
• M1 reported crash J43–J42 southbound · yesterday 11:05, cleared after 41 min
• M1 crash J47 northbound · yesterday 03:39, cleared after 35 min
• M1 reported crash J8 northbound · yesterday 02:20, cleared after 54 min
• M1 closed J12–J13 · Fri 22:23, cleared after 39 min

About this page

This page shows what the data sources reported about this event and when, merged from every source that reported it at the same place. It doesn't say what caused it or whether anyone was hurt: no source reports that. Times are UK time. For live alerts, follow @motorways.me on Bluesky.