- Emergency services say there are "multiple casualties"
- The M11 is closed northbound from junction 7 to junction 8
- The crash involved three cars, a lorry and a horsebox
- Five fire crews have been sent to the scene
More top news
Detectives investigating the Parsons Green terrorist attack have arrested a 17-year-old boy in Thornton Heath, south London.
A review of the law is being considered after a cyclist who crashed into and killed a mother-of-two was convicted using a Victorian law.
Speaking to ITV News Foreign Office minister Tobias Ellwood said education was the greatest weapon in the fight against extremism.