A woman sustained a head injury in a four-car collision on the M25 this morning.
A black Vauxhall Insignia, a silver Audi A1, a black BMW 3 series and a grey Jaguar XK were involved in a crash near Junction 17, for Maple Cross, at 9.36am.
Lanes three and four of the anti-clockwise carriageway remain blocked, with congestion reported back to Junction 19 for Watford.
Three people were injured, two of which were taken to hospital.
The emergency services remain at the scene of the crash.
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