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21Junction

M25 Junction 21 Traffic

St Albans & Bricket Wood · M1 South · near Watford

🦁 The junction for ZSL Whipsnade Zoo

Event day: Watford v Lincoln City · Tue 3 Nov · kick-off 19:45 · 3 miles south - plan for extra traffic

M25 J21 at 14:06 on Tuesday 3 November: nothing reported at this junction — live National Highways updates every few minutes.

Home › Traffic › Roads › M25 › Junction 21

🚨 Live at M25 J21 right now

Checked 14:06 · auto-refresh
✅Nothing reported at M25 J21 right now.

Straight from National Highways, re-checked every 3 minutes while this page is open.

All live M25 traffic →M25 clockwise →M25 anticlockwise →M25 roadworks →

Is M25 junction 21 closed? Quick answers

Checked 14:06 on Tuesday 3 November 2026.

Is M25 junction 21 closed right now?

No. Nothing is closing the road at M25 junction 21 at 14:06.

Is M25 junction 21 closed tonight?

No. No closures are planned at M25 junction 21 tonight (Tue 3 Nov, 18:00 to 06:00).

Tonight: every M25 closure ›

Is M25 junction 21 closed this weekend?

No. No closures are planned at M25 junction 21 this weekend (Fri 6 Nov 18:00 to Mon 9 Nov 06:00).

This weekend: every M25 closure ›

Is there an accident at M25 junction 21 today?

No. No collision has been reported at M25 junction 21 since midnight.

M25 accidents today and yesterday ›

Answers use official data only: the National Highways live incident feed and their planned closure report. A closure is counted here when National Highways name this junction or a stretch that runs through it.

🗺️ Where M25 J21 is

Location from the National Highways junction reference. Nearest towns: Watford, Radlett, Hemel Hempstead, Rickmansworth.

🎟️ Events near M25 J21 this week

Matches and events from National Highways, the football fixture lists and our team. Start and kick-off times are the source's own and can change. All event traffic this week ›

📍 Heading to… from M25 J21

Places and the junctions they are reached from are kept by our team; distances are measured in a straight line from the junction, not along the road.

⚠️ Collision record on the M25 at J21

190Collisions
2Fatal
27Serious
293Casualties
92
Far worse than most
Ranked 43 of 556 UK junctions on record · 11 of 33 on the M25

Wider area: counting every road within 3 miles — local streets, A-roads, everything — 2,651 collisions are on record, 22 of them fatal. That figure follows how built-up the area is, so it is shown for context and is not what the ranking uses.

Department for Transport STATS19 police collision records on the M25 itself, within 2 miles of J21. This is the free summary — the full breakdown by severity, weather, road surface, time of day and individual record is in the blackspot report.

📊 Full collision analysis for M25 J21 → 11 of 33 junctions on the M25 · see where it ranks nationally

❓ M25 J21 — Frequently Asked Questions

Where is M25 junction 21?

M25 J21 is at St Albans & Bricket Wood. National Highways signs it as M1 South. The nearest town is Watford.

Is there an accident at M25 J21?

No — as of 14:06 National Highways list nothing at M25 J21. This page re-checks their live feed every few minutes, 24 hours a day.

Is M25 junction 21 closed?

No closure is listed at M25 J21 as of 14:06.

How many accidents happen at M25 junction 21?

Police STATS19 records show 190 collisions on the M25 within 2 miles of J21, including 2 fatal and 27 serious. Counting every road in the area, 2,651 collisions are recorded within 3 miles. That ranks it 43 of 556 UK junctions we hold collision records for.

Which places is M25 junction 21 the junction for?

M25 J21 is the junction for ZSL Whipsnade Zoo (zoo & wildlife, Whipsnade), about 12 miles north-west in a straight line - reached from M25 J21.

What is near M25 junction 21?

Within 15 miles of M25 J21: Warner Bros. Studio Tour London (attraction, Leavesden), about 1 mile west in a straight line; Vicarage Road (stadium, Watford), about 3 miles south in a straight line; St Albans Cathedral (heritage, St Albans), about 4.5 miles north-east in a straight line; Hatfield House (heritage, Hatfield), about 9.5 miles north-east in a straight line; Wembley Stadium (stadium, Wembley), about 11 miles south-east in a straight line; London Luton Airport (airport, Luton), about 13 miles north in a straight line.

🚨 Live M25 traffic

Live incidents, roadworks and delays for the whole M25, updated every 5 minutes from National Highways.

🚗 M25 live traffic →

↔️ Next junctions

← J20
Kings Langley & Abbots Langley J21A
St Albans & Bricket Wood →

📍 Towns near this junction

Watford 2.6 mi Radlett 3.6 mi Hemel Hempstead 4.6 mi Rickmansworth 4.9 mi

🔢 All M25 junctions

J1A J1B J2 J3 J4 J5 J6 J7 J8 J9 J10 J11 J12 J13 J14 J15 J16 J17 J18 J19 J20 J21 J21A J22 J23 J24 J25 J26 J27 J28 J29 J30 J31

🆘 Broken down near M25 J21?

Car recovery near this junction - local firms you can call direct:

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On a motorway? If you can, get onto the hard shoulder or into an emergency area, leave by the left-hand doors and wait behind the barrier. Stuck in a live lane: stay in the car with your seatbelt on and hazard lights on, and call 999.

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