Overview

• The crash was reported at about 6:45am on Sunday on the M23/A23 northbound between M25 Junction 8 and the A237, prompting a full carriageway closure.
• Surrey Police confirmed that a man in his 50s died at the scene and a man in his 40s was arrested on suspicion of causing death by dangerous driving; the suspect remains in custody.
• National Highways warned the closure would last several hours and diverted motorists via local routes, causing extensive delays for south London commuters.
• Surrey Police officers and South East Coast Ambulance Service paramedics secured the scene and coordinated with forensic collision investigators.
• Investigators have appealed for any CCTV, dashcam or helmet-cam footage—particularly of a purple Audi Q4—citing police reference PR/45250100767.