M25 crash J21–J20 anticlockwise

Crash on the M25 anticlockwise at J21–J20 on Wednesday 28 October 2026, from 16:40. Cleared at 21:34 after 4 h 54 min. Timeline of reports from TomTom and the motorway signs.

Status

Cleared 21:34 on 28 Oct 2026, after 4 h 54 min

Location

M25 anticlockwise · J21–J20

Reported as

Collision

At its worst

Stationary traffic · delay ~40 min

Sources

TomTom ×14 · Motorway signs ×5

Timeline

1. Wed 16:40 TomTom: queueing traffic, “Slow traffic”, delay ~3 min
2. Wed 16:46 TomTom: queueing traffic, “Slow traffic”, delay ~7 min
3. Wed 16:56 TomTom: queueing traffic, “Queuing traffic”, delay ~8 min
4. Wed 17:02 TomTom: queueing traffic, “Queuing traffic”, delay ~16 min
5. Wed 17:06 TomTom no longer reports it
6. Wed 17:06 All clear: no source reports it any more
7. Wed 17:07 TomTom: queueing traffic, “Queuing traffic”, delay ~9 min (reported again)
8. Wed 17:10 Motorway signs: “COLLISION SLOW DOWN”
9. Wed 17:11 TomTom: queueing traffic, “Queuing traffic”, delay ~5 min
10. Wed 17:16 TomTom: delay now ~10 min (was ~5)
11. Wed 17:22 TomTom: queueing traffic, “Queuing traffic”, delay ~15 min (reported again)
12. Wed 17:26 TomTom: queueing traffic, “Stationary traffic”, delay ~15 min
13. Wed 17:27 TomTom: queueing traffic, “Queuing traffic”, delay ~25 min
14. Wed 17:36 TomTom: delay now ~40 min (was ~14)
15. Wed 17:36 TomTom: queueing traffic, “Stationary traffic”, delay ~21 min (reported again)
16. Wed 17:41 TomTom: delay now ~27 min (was ~40), “Stationary traffic”
17. Wed 17:46 TomTom: queueing traffic, “Stationary traffic”, delay ~29 min (reported again)
18. Wed 17:46 TomTom: queueing traffic, “Stationary traffic”, delay ~31 min
19. Wed 17:56 TomTom: queueing traffic, “Queuing traffic”, delay ~29 min
20. Wed 18:01 TomTom: delay now ~26 min (was ~20)
21. Wed 18:06 TomTom: queueing traffic, “Stationary traffic”, delay ~28 min
22. Wed 18:11 TomTom: queueing traffic, “Queuing traffic”, delay ~25 min (reported again)
23. Wed 18:17 TomTom: “Queuing traffic”
24. Wed 18:17 TomTom: delay now ~10 min (was ~20), “Queuing traffic”
25. Wed 18:22 Motorway signs no longer show “COLLISION SLOW DOWN”
26. Wed 18:27 TomTom: queueing traffic, “Stationary traffic”, delay ~22 min
27. Wed 18:32 TomTom: “Slow traffic”
28. Wed 18:32 Motorway signs: “REPORT OF PEDESTRIANS”
29. Wed 18:32 Motorway signs: “REPORT OF PEDESTRIANS”
30. Wed 18:37 TomTom: “Queuing traffic”
31. Wed 18:42 TomTom: queueing traffic, “Queuing traffic”, delay ~20 min (reported again)
32. Wed 18:42 TomTom: “Queuing traffic”
33. Wed 18:52 TomTom: queueing traffic, “Queuing traffic”, delay ~15 min
34. Wed 18:53 Motorway signs: “COLLISION SLOW DOWN”
35. Wed 18:57 TomTom: queueing traffic, “Queuing traffic”, delay ~18 min (reported again)
36. Wed 19:02 TomTom: collision, “Stationary traffic, Accident”, delay ~12 min (reported again)
37. Wed 19:07 TomTom: delay now ~25 min (was ~12)
38. Wed 19:12 TomTom: queueing traffic, “Slow traffic”, delay ~17 min (reported again)
39. Wed 19:17 Motorway signs: “COLLISION AHEAD”
40. Wed 19:17 TomTom: “Slow traffic”
41. Wed 19:22 TomTom: “Queuing traffic”
42. Wed 19:22 TomTom: delay now ~30 min (was ~22)
43. Wed 19:23 Motorway signs no longer show “REPORT OF PEDESTRIANS”
44. Wed 19:23 Motorway signs no longer show “REPORT OF PEDESTRIANS”
45. Wed 19:23 All clear: no source reports it any more
46. Wed 19:27 TomTom: “Slow traffic”
47. Wed 19:27 TomTom: delay now ~40 min (was ~30)
48. Wed 19:32 TomTom: “Queuing traffic”
49. Wed 19:37 TomTom: queueing traffic, “Queuing traffic”, delay ~6 min
50. Wed 19:43 TomTom: “Stationary traffic”
51. Wed 19:43 TomTom: queueing traffic, “Slow traffic”, delay ~9 min
52. Wed 19:48 TomTom: “Queuing traffic”
53. Wed 19:53 Motorway signs: “REPORT OF PEDESTRIANS” (reported again)
54. Wed 19:53 Motorway signs no longer show “COLLISION AHEAD”
55. Wed 20:14 TomTom: queueing traffic, “Slow traffic”, delay ~4 min (reported again)
56. Wed 20:23 Motorway signs no longer show “REPORT OF PEDESTRIANS”
57. Wed 20:23 TomTom: delay now ~21 min (was ~30)
58. Wed 20:28 TomTom: delay now ~28 min (was ~21)
59. Wed 20:53 Motorway signs: “COLLISION AHEAD” (reported again)
60. Wed 21:14 TomTom: delay now ~13 min (was ~20)
61. Wed 21:19 TomTom: now says queueing traffic, delay now ~8 min (was ~13), “Stationary traffic”
62. Wed 21:20 Motorway signs no longer show “COLLISION AHEAD”
63. Wed 21:20 Motorway signs no longer show “COLLISION SLOW DOWN”
64. Wed 21:24 TomTom: “Slow traffic”
65. Wed 21:34 TomTom no longer reports it
66. Wed 21:34 All clear: no source reports it any more

Source reports

• Slow traffic
• Stationary traffic
• Queuing traffic
• Overhead signs read “COLLISION SLOW DOWN” (3 signs; furthest along: M25 anti-clockwise between J21 and J20).
• Overhead signs read “REPORT OF PEDESTRIANS” (7 signs; furthest along: M25 clockwise within J14).
• Overhead signs read “REPORT OF PEDESTRIANS” (2 signs; furthest along: M25 anti-clockwise between J14 and J13).
• Overhead signs read “COLLISION AHEAD” (1 sign; furthest along: M25 anti-clockwise between J22 and J21A).
• Overhead signs read “COLLISION SLOW DOWN” (2 signs; furthest along: M25 anti-clockwise between J22 and J21A).

Other recent incidents on the M25

• M25 crash J27–J26 anticlockwiseyesterday 19:13 · cleared after 1 h 9 min
• M25 crash J25–J26 clockwiseyesterday 19:12 · cleared after 1 h 9 min
• M25 reported crash J5 clockwiseyesterday 18:40 · cleared after 42 min
• M25 crash J5–J6 clockwiseyesterday 17:35 · cleared after 1 h 16 min
• M25 crash J5–J6 clockwiseyesterday 17:25 · cleared after 1 h 26 min
• M25 stopped traffic J30yesterday 17:06 · cleared after 1 h 4 min
• M25 crash J21A–J22 clockwiseyesterday 16:40 · cleared after 52 min
• M25 crash J30–J29 anticlockwiseyesterday 09:43 · cleared after 1 h 36 min
• M25 reported crash J27 anticlockwiseyesterday 08:38 · cleared after 41 min
• M25 stopped traffic J3–J2yesterday 07:02 · cleared after 5 h 16 min

Live traffic and past incidents at M25 J21 and M25 J20.

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