There are severe delays on the M25 near Potters Bar after a road was closed for emergency repairs.
The M25 anticlockwise is closed between Junction 21A (for the A405) and Junction 20 (for the A41) for emergency bridge repairs, and has caused severe knock-on delays towards Junction 24 for Potters Bar.
Drivers are being advised to avoid the route as delays are expected to last until the early afternoon.
A Highways England spokesperson said: “Safety is Highways England’s top priority. During a routine inspection yesterday a minor crack was discovered on the Gade Valley Viaduct near to the M25 Junction 20.
“The closures are in place to allow repairs to be carried out as quickly as possible to stop the crack from growing and maintain safe journeys.
“We would like to thank drivers in advance for their patience and reassure them that we will be working as hard as we can to reopen the M25 as soon as safely possible.”
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