- 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
London mayor Boris Johnson delegated the final decision to a deputy after publicly supporting the project.
A man who fired at officers from the National Crime Agency has been convicted at the Old Bailey.
Want to know its posh name? It's a 'Track Retrieval Device'.