M23 closed after multi-vehicle crash near Gatwick Airport

The M23 southbound carriageway was closed near Gatwick Airport after a multi-vehicle collision on 4 August 2026. National Highways, which manages the motorway, confirmed the incident in a statement to local media. The closure affected traffic heading toward the airport and the town of Crawley in West Sussex.

The crash occurred on the approach to junction 9a, where the M23 meets the A23. Drivers were advised to avoid the area or prepare for significant delays. National Highways did not specify how many vehicles were involved or whether there were any injuries. Emergency services attended the scene, but no further details were provided.

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Impact on local traffic and airport access

The closure caused disruption for drivers travelling to Gatwick Airport, one of the UK’s busiest transport hubs. Local roads in Crawley and Horley, including the A23 and A2011, experienced increased traffic as drivers sought alternative routes. Surrey and Sussex police urged motorists to follow diversions and check traffic updates before travelling.

Gatwick Airport said it was monitoring the situation but had not reported any immediate impact on flights or passenger access. A spokesperson for the airport told *This Is Local London* that passengers should allow extra time for journeys to the airport due to the motorway closure. No changes to flight schedules were announced.

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What happens next

National Highways has not provided a timeline for reopening the M23 southbound. Recovery teams were at the scene assessing damage and clearing debris. Drivers are advised to use the M25 as an alternative route or follow signs for local diversions. Updates will be posted on National Highways’ traffic England website and social media channels.

Surrey and Sussex police said they would release more information once the scene had been secured. It is unclear whether any lanes will reopen before the full carriageway is cleared. Residents in Crawley and Horley are advised to expect continued congestion on local roads throughout the afternoon.