M25 overnight closures planned for 7-10 August 2026 affecting Barnet routes
National Highways will close sections of the motorway between junctions 15 and 31 for resurfacing work
Trust 42Craft 55Hype 70How this was reported ▾
Single source, no named official or document cited for closures.
How well corroborated and evidenced the reporting is. Higher is better.
No affected parties or responsible body quoted; vague 'motorists encouraged'.
Context, balance and separation of fact from comment. Higher is better.
Headline overstates 'havoc' with no evidence of disruption scale.
How far presentation runs ahead of substance. Lower is better.
1 source assessed · methodology
National Highways will close multiple sections of the M25 overnight between 7 and 10 August 2026. The works will affect clockwise and anti-clockwise carriageways near key junctions, including those serving Barnet and neighbouring boroughs. Residents travelling to or from Heathrow, the M40 or the A13 should expect delays.
The first closures begin at 10pm on 7 August. The clockwise carriageway between Junction 25 (Waltham Abbey) and Junction 26 (Loughton) will shut until 6am on 8 August. The anti-clockwise link road between Junction 31 (Lakeside) and Junction 30 (A13) will close from 11pm to 5:30am on the same night.
M25 night closures until 7 August affect Barnet drivers daily
National Highways schedules overnight motorway works with diversions across multiple junctions
Barnet routes affected on 8-9 August
On the night of 8 August, the anti-clockwise carriageway between Junction 16 (M40) and Junction 15 (M4) will close from 10pm to 5:30am. The slip road from Junction 16 to the M40 westbound will also shut during these hours. Junction 11 (Chertsey) will close from 10pm to 6am.
Junction 11 will close again on 9 August, this time from 10:30pm to 5:30am. The final night of closures, 10 August, will see the clockwise carriageway between Junction 15 (M4) and Junction 16 (M40) shut from 10pm to 5:30am. The M4 eastbound and westbound link roads to the M25 anti-clockwise will also close.
M25 and key London motorways close overnight for roadworks
National Highways shuts sections of the M25, A282 Dartford Crossing, A1(M) and M3 between 29 and 30 July 2025
Diversions and travel advice
National Highways has not released specific diversion routes for these closures. Drivers are advised to follow signed diversions on the night and to check traffic updates before travelling. The closures coincide with weekend travel, which may increase congestion on local roads in Barnet and Essex.
A spokesperson for National Highways said, as reported by *This Is Local London*, that motorists should "allow extra time for journeys and adhere to signed diversion routes during closures". No further details on the purpose of the works were provided in the announcement.
What happens next
The closures are scheduled to end by 6am on 11 August 2026. National Highways has not confirmed whether additional works are planned for later in the year. Drivers can check real-time traffic updates via the National Highways website or local travel bulletins.
Questions this report answers
+Which M25 junctions will close overnight in August 2026?
Junctions 15 (M4), 16 (M40), 25 (Waltham Abbey), 26 (Loughton), 30 (A13) and 31 (Lakeside) will close overnight between 7 and 10 August 2026. Closures affect both clockwise and anti-clockwise carriageways, as confirmed by National Highways.
+What time will the M25 closures start and end?
Closures will begin at 10pm or 11pm each night and end between 5:30am and 6am the following morning. The earliest reopening time is 5:30am, as reported by *This Is Local London* on the planned roadworks.
+Will there be diversions during the M25 closures?
National Highways has advised drivers to follow signed diversion routes during the closures. Specific diversion details have not been released, so motorists should check traffic updates before travelling.
+How can drivers avoid delays during the M25 closures?
Drivers are advised to allow extra travel time and plan alternative routes. Checking real-time traffic updates via National Highways or local travel bulletins may help avoid congestion on local roads in Barnet and Essex.
WE FILE
No invented reporter. No hidden source trail.
The London Travel Desk assembled this report from the outlets listed below. Language-model drafting is reviewed under human editorial supervision, with scoring notes and corrections kept visible.
More Coverage in Roads & Driving
M25 night closures until 7 August affect Barnet drivers daily
M25 and key London motorways close overnight for roadworks
Broken-down vehicle causes M25 delays near Sevenoaks on 5 August 2026
