M25 slip road closed after driver has cardiac arrest

Hertfordshire Constabulary and the East of England Ambulance crew were called to Rickmansworth Road, Chorleywood at 12.30pm after concern for the welfare of a man. 

The man, believed to be in his 30s, was in cardiac arrest. He was taken by land ambulance to Harefield Hospital in a critical condition.

Two rapid response vehicles, an ambulance officer and East Anglian Air Ambulance were dispatched. 

The incident is at junction 18 A404 at Chorleywood and traffic is slow on the approach. 

For updates: http://www.watfordobserver.co.uk/li/traffic.detail.10074228/?ref=ltp