A motorcyclist is fighting for life after a crash involving eight cars brought the M25 to a standstill.
The accident happened between junctions 27 and 28 near Brentwood shortly before 9.30am. Motorists faced hours of delays as a result.
The motorcyclist, a man in his 50s, was rushed to hospital in a critical condition, police said.
No one else was injured in Saturday morning's crash.
Highways England tweeted earlier: “Expect long delays on the M25 anti-clockwise from J29. The M25 is closed between J28 and J27.
“Consider alternative routes and allow plenty of extra time for your journey.”
A spokeswoman for the Met Police said: 'We were called at 9.21am this morning to a road traffic collision on the M25 near Brentwood.
“Eight cars and a motorbike were involved in the crash.
“At 59-year-old motorcyclist has been taken to hospital in a critical condition.
“His next of kin are aware.”
