M25 traffic live updates on Friday, 26 June 2026, are focused on the Holmesdale Tunnel after a multi-vehicle crash blocked lanes on the anticlockwise carriageway between Junction 26 and Junction 25. The collision, understood to involve a car, a van and a lorry, happened at around 6.40am during the morning rush hour, leaving emergency services working inside the tunnel and drivers facing heavy congestion on one of the busiest sections of the London orbital motorway, reports The WP Times.
The crash caused major disruption for commuters travelling towards Enfield, Cheshunt and the wider north London road network. Several lanes were initially blocked while firefighters, paramedics and traffic officers attended the scene. National Highways warned of long delays on the approach, with congestion stretching for miles as traffic was held or filtered past the incident. Although some lanes later reopened, drivers were still being told to expect slow-moving traffic and extended journey times through the area.
What happened on the M25 at the Holmesdale Tunnel today
The crash happened on the M25 anticlockwise inside the Holmesdale Tunnel on Friday morning, 26 June 2026. The affected stretch sits between Junction 26 for Waltham Abbey and Junction 25 for Enfield and Cheshunt. According to early traffic reports, a black car appeared to be badly damaged, while a van and a lorry were also understood to have been involved.
Emergency services were called to the tunnel shortly after the collision. Firefighters attended the scene, and paramedics were also seen at the incident. At the time of the first updates, it was not immediately clear how many people had been injured, if any. The priority for responders was to secure the tunnel, assess those involved and make the carriageway safe before lanes could fully reopen. The timing of the crash made the disruption worse. A 6.40am incident on the M25 means the road is hit just as commuter traffic is building. That is why delays quickly increased, even after some lanes were reopened.
Where is the Holmesdale Tunnel and which part of the M25 is affected?
The Holmesdale Tunnel carries the M25 between the Hertfordshire town of Waltham Cross and the northern edge of Enfield. The crash affected the anticlockwise carriageway between J26 and J25, a key section for drivers travelling around north London, Essex and Hertfordshire.
This part of the motorway is heavily used by commuters, delivery traffic and long-distance drivers moving between the M11, A10, A121 and other major routes. When lanes are closed inside the tunnel, the effect is immediate because traffic has limited space to move around the incident. The main disruption was reported on the approach to the tunnel, with congestion building back from the closure point. Drivers heading anticlockwise were the most affected, while nearby routes were also at risk of extra pressure as motorists looked for alternatives.
Why did the M25 crash cause such heavy delays
A tunnel crash is more complex than a collision on an open section of motorway. Emergency crews need safe access, damaged vehicles have to be checked and moved, and the road surface may need to be inspected for debris, fuel or other hazards. Until that work is done, lanes cannot simply be reopened. The Holmesdale Tunnel also has limited room for recovery vehicles and emergency workers. That means traffic officers often need to close several lanes at first, even if the crash itself appears to be contained in one part of the tunnel. Safety checks are especially important because a tunnel incident can create additional risks for drivers and responders. The morning rush hour added further pressure. Even a short lane closure on the M25 can create long queues, but a multi-vehicle crash inside a tunnel at peak time can quickly lead to delays of 40 minutes or more. Once a queue forms, it can take much longer to clear than the original incident itself.
M25 traffic live: what drivers should know now
| Detail | Latest position |
|---|---|
| Date | Friday, 26 June 2026 |
| Road | M25 anticlockwise |
| Location | Holmesdale Tunnel |
| Junctions affected | Between J26 and J25 |
| Time of crash | Around 6.40am |
| Vehicles involved | Car, van and lorry understood to be involved |
| Emergency response | Firefighters, paramedics and traffic officers attended |
| Main impact | Lane closures, long delays and heavy congestion |
| Driver advice | Allow extra time and check live traffic before travelling |
Drivers should avoid the area if their journey can be delayed. Those already on the M25 should stay in lane where possible, follow overhead signs and avoid sudden lane changes near the tunnel. Anyone approaching the queue should slow down early, as traffic may stop suddenly.
Even after lanes reopen, delays can remain for some time. This is because traffic that has been held back must move through the tunnel gradually. Drivers should not assume that a reopened lane means the motorway is back to normal.
Are there alternative routes around the M25 closure?
Some drivers may look towards local roads through Waltham Cross, Cheshunt, Enfield or Waltham Abbey. However, these routes can quickly become congested when the M25 is disrupted. A diversion that looks shorter on a map may not actually save time during a peak-hour incident. For drivers heading into north London, the A10 may be an option depending on destination, but it can also become busy when traffic leaves the motorway. Those travelling longer distances may be better advised to delay their journey or use live navigation to compare realistic travel times before leaving. The most important point is to avoid making last-minute changes near the tunnel. Sudden exits, lane changes or attempts to cut through local roads can increase delays and create further safety risks.
What should commuters do if they are stuck in the M25 traffic
Commuters caught in the queue should remain patient and keep enough distance from the vehicle in front. In tunnel approaches, drivers should be especially careful because traffic can move from slow to stationary very quickly. Emergency access must be kept clear at all times.
If traffic is fully stopped, drivers should listen for police or National Highways instructions and watch the overhead motorway signs. These signs may show lane closures, speed limits or instructions to move left or right. Ignoring them can slow the emergency response and may put other road users at risk. Those heading to work, school runs, medical appointments or airport connections should notify anyone waiting for them as early as possible. Delays on the M25 can change quickly, and journey times may remain unpredictable even after the first recovery work is completed.
Why the M25 is so vulnerable to major disruption
The M25 is one of the busiest motorways in the UK. It carries commuter traffic, freight, airport journeys, local traffic and long-distance travel around London. Because so many routes connect into it, a single incident can affect a much wider area than the crash location itself. The Holmesdale Tunnel is particularly sensitive because it narrows driver options. Unlike an open motorway section, a tunnel does not allow easy movement around an incident. Emergency teams must manage access carefully, and traffic officers need to protect both the people involved in the crash and the crews working at the scene.
This is why even a partial reopening may not immediately clear the problem. Traffic flow has already been reduced, queues have formed, and drivers are still moving through a controlled section. The result is a longer recovery period for the road network.
What happens next after the Holmesdale Tunnel crash
The next stage is usually full vehicle recovery, safety inspection and final reopening of all lanes. If there is debris, fuel or damage to tunnel equipment, clearance can take longer. If there are injuries, police and emergency services may also need time to investigate the circumstances of the collision. For drivers, the key message is to keep checking live updates before travelling on the M25 anticlockwise between J26 and J25. The situation can improve quickly once lanes reopen, but residual congestion may continue into the late morning.
The crash is another reminder of how quickly the M25 can become heavily disrupted during rush hour. Anyone travelling around north London on Friday, 26 June 2026, should plan extra time, check live traffic and consider whether the journey can be delayed until the Holmesdale Tunnel area fully clears.
M25 traffic live: what drivers should do near the Holmesdale Tunnel
Drivers travelling on Friday, 26 June 2026, should avoid the M25 anticlockwise between J26 and J25 if their journey can be delayed. The Holmesdale Tunnel crash caused long queues, lane closures and slow-moving traffic, so the most practical option for non-urgent trips is to wait until National Highways confirms that the tunnel area has fully cleared.
If you must travel, check M25 traffic live updates before leaving and allow at least one extra hour for the journey. Drivers heading towards Enfield, Cheshunt, Waltham Cross or north London should expect congestion not only inside the tunnel, but also on nearby approach roads. Even after lanes reopen, delays can continue because traffic needs time to move through the restricted section.
The A10 may be an alternative for some drivers travelling towards north London, while local routes through Waltham Abbey, Waltham Cross, Cheshunt and Enfield may help short local journeys. However, these roads can quickly become busy when motorway traffic leaves the M25, so drivers should not assume that a diversion will be faster. Compare live journey times before changing route.
Anyone already stuck in the M25 crash traffic should stay in lane, follow overhead signs and keep emergency access clear. Sudden lane changes near the Holmesdale Tunnel can slow the recovery work and increase the risk of another collision. Drivers travelling to an airport, hospital appointment, school exam, work shift or timed booking should warn their destination as early as possible and keep checking London traffic updates throughout the journey.
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