M23 traffic chaos after Gatwick collision
Emergency services were called to the scene near the Welcome roundabout in Airport Way shortly after 5am.
The pedestrian suffered serious injuries and has been taken to Surrey Hospital.
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Hide AdPolice remain at the scene and drivers are advised to go via the North Terminal and use the internal transit system to get back to the South Terminal as the road remains closed.
Severe delays have been reported near the M23 Gatwick Spur roundabout junction.
The M23 is congested to the J9 main carriageway and police have a diversion in place at Junction 9A.