M25 closed J21 anticlockwise (obstruction)

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.

Status

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

Location

M25 anticlockwise · J21

Reported as

Obstruction or hazard

Lanes

Road closed

At its worst

Stationary traffic · delay ~103 min

Sources

TomTom ×4 · Motorway signs

Timeline

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

Source reports

• 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 closed J21A–J22 anticlockwise02:24 · Live
• M25 stopped traffic J16–J15yesterday 22:48 · cleared after 56 min
• M25 stopped traffic J20–J19 anticlockwiseyesterday 15:48 · cleared after 2 h 52 min
• M25 stopped traffic J3–J2yesterday 14:05 · cleared after 4 h 27 min
• M25 crash J10–J9 anticlockwiseyesterday 11:36 · cleared after 9 h 11 min
• M25 delays J5–J6yesterday 06:15 · cleared after 3 h 22 min
• M25 crash J16 clockwiseWed 22:40 · cleared after 1 h 1 min
• M25 stopped traffic J8–J7Wed 16:58 · cleared after 2 h 17 min
• M25 stopped traffic J15–J16 clockwiseWed 14:27 · cleared after 5 h 2 min
• M25 stopped traffic J2Wed 06:51 · cleared after 1 h 59 min

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