- 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
Services on major rail routes between London and south west England have been severely disrupted after a person was hit by a train.
The business executive, whose ruthless interviewing technique has won him many fans, is replacing Nick Hewer, who quit after a decade.
Recent opinion polls show Labour within striking distance of capturing the trophy seat of Finchley and Golders Green.