Summary

Live updates as M25 shut by South Mimms and London Colney

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  • The M25 in Hertfordshire was closed this morning after a four-vehicle crash at 6.20am
  • The air ambulance service was called after the collision between junction 23 (South Mimms) and 22 (London Colney) anticlockwise
  • A spokesperson confirmed a man was critically injured and rushed to hospital
  • The stretch has since been reopened, with residual delays now expected to ease

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