A fatal crash on the M23 southbound near Gatwick Airport has led to the motorway being closed for hours, causing severe delays during the morning rush hour. The collision occurred at junction 9 for Crawley and Gatwick at approximately 1am on July 8, 2026.
Carriageway closure and investigation
National Highways confirmed that the southbound carriageway is expected to remain closed until at least early afternoon while Sussex Police conduct a crash investigation. The force stated that the southbound carriageway is likely to be closed all morning following the collision.
Drivers face severe delays as traffic backs up in both directions, with congestion reaching junction 10. People traveling to London Gatwick Airport, the UK's second busiest airport, are advised to allow extra time and use alternative routes.
Police appeal for witnesses
Sussex Police have appealed for any eyewitnesses or motorists with dashcam footage to come forward. Diversions are in place, and motorists are encouraged to plan alternative routes.
National Highways said: 'Due to the serious nature of the incident, Sussex Police investigations remain ongoing and will continue to take place throughout the day. The carriageway is expected to remain closed until at least early afternoon. Road users heading to London Gatwick Airport this morning are advised to allow plenty of extra time and to consider alternative routes.'
Sussex Police added: 'The southbound carriageway there is likely to be closed all morning following the collision, which happened just before 1am. Diversions are in place and motorists are encouraged to plan alternative routes.'
