National Highways said: ‘Surrey Police, Surrey Fire and Rescue Service and South East Coast Ambulance Service are working at the scene of this multi-vehicle collision.
‘National Highways Traffic Officers are also on scene and assisting the emergency services with traffic management.’.
South East Coast Ambulance Service told Metro it assessed four patients and treated them at the scene.
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Four motorists were taken to hospital after a crash that closed the M23 in Surrey.
