M25 closed J21 anticlockwise (obstruction)

Cleared Cleared at 19:14 on 12 Oct 2026, after 3 h 31 min.

Road closure on the M25 anticlockwise at J21 on Monday 12 October 2026, from 15:43. Cleared at 19:14 after 3 h 31 min. Timeline of reports from TomTom and the motorway signs.

1. ▲

   M25 anticlockwise · J21

   Obstruction or hazard

   Road closed · 15:43–19:14 (cleared after 3 h 31 min) · delay ~18 min · queue 9.0 mi

   TomTom ×4 · Motorway signs

See the M25 on the live map M25 traffic now

Timeline

1. 15:43 TomTom: queueing traffic, “Queuing traffic”, delay ~8 min
2. 15:44 TomTom: queueing traffic, “Stationary traffic”, delay ~14 min
3. 15:47 TomTom: delay now ~21 min (was ~14)
4. 16:06 TomTom: “Stationary traffic”
5. 16:15 TomTom: now says collision, delay now ~60 min (was ~45), “Stationary traffic, Accident”
6. 16:20 TomTom: road closed
7. 16:20 TomTom: now says queueing traffic, “Stationary traffic”
8. 16:24 TomTom: delay now ~43 min (was ~30), “Queuing traffic”
9. 16:33 TomTom: queueing traffic, “Queuing traffic”, delay ~18 min
10. 16:33 TomTom: delay now ~21 min (was ~42), “Stationary traffic”
11. 16:38 TomTom: delay now ~40 min (was ~21), “Queuing traffic”
12. 16:43 TomTom: delay now ~20 min (was ~40)
13. 16:43 TomTom: delay now ~57 min (was ~103)
14. 17:10 TomTom: delay now ~30 min (was ~21)
15. 17:28 Motorway signs: “REPORT OF DEBRIS”
16. 17:38 TomTom: delay now ~17 min (was ~30)
17. 17:47 TomTom: “Slow traffic”
18. 17:52 TomTom: delay now ~23 min (was ~16)
19. 17:56 TomTom: “Queuing traffic”
20. 18:05 TomTom: delay now ~9 min (was ~21)
21. 18:23 Motorway signs no longer show “REPORT OF DEBRIS”
22. 18:38 TomTom: “Slow traffic”
23. 18:47 TomTom: delay now ~9 min (was ~14)
24. 19:14 TomTom no longer reports it
25. 19:14 All clear: no source reports it any more

What the sources said

• Slow traffic
• Closed
• Queuing traffic
• Overhead signs read “REPORT OF DEBRIS” (12 signs; furthest along: M25 anti-clockwise within J21).

Other recent incidents on the M25

• M25 crash J20–J19 anticlockwise · 06:19, cleared after 3 h 47 min
• M25 crash J5–J6 clockwise · 06:13, cleared after 3 h 21 min
• M25 crash J29–J30 clockwise · 02:43, cleared after 45 min
• M25 crash J26–J25 clockwise · yesterday 08:26, cleared after 56 min
• M25 crash J26–J27 clockwise · Sat 13:57, cleared after 48 min
• M25 crash J16 anticlockwise · Sat 09:02, cleared after 27 h 58 min
• M25 reported crash J3–J2 anticlockwise · Sat 03:52, cleared after 50 min
• M25 crash J16–J15 anticlockwise · Fri 12:34, cleared after 6 h 45 min
• M25 crash J14 clockwise · Fri 09:35, cleared after 16 h 36 min
• M25 stopped traffic J17 · Fri 06:54, cleared after 13 h 10 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.