An air ambulance was called to site of the crash near the M25 slip road exit
A man has died in hospital after a crash which closed the M1 southbound in Hertfordshire.
A Renault Clio and Vauxhall Astra crashed between Junctions Seven and Six, near Hemel Hempstead, at about 09:40 GMT on Sunday.
The man, who was in his 60s, died on Monday, police said, while a woman remains in a critical condition.
There were long delays for several hours after the crash, just before the exit slip road to the M25 junction.
The road reopened at about 13:00, the Highways Agency said
Long queues of traffic built up in the area
- Published22 February 2015
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