UPDATE: Avon and Somerset Police have stated the road is expected to remain closed until this afternoon, while the articulated lorry and the van involved are recovered.

A KEY Somerset A-road is currently closed due to what police are describing as a 'serious injury collision'.

Emergency services are at the scene of the incident which has closed the A371 near Wincanton.

Police rushed to the scene after a call at around 5:20am this morning (Wednesday, June 26), reporting a collision between a Citroen van and a lorry near Bratton Seymour.

Four people from the van have been injured, one significantly, and police have not yet been able to trace their next of kin.

The lorry driver is reportedly 'shocked but unhurt'.

Avon and Somerset Police are appealing for anyone with information to come forward, and urging Glastonbury Festival-goers to take an alternate route.

A spokesperson said: "The A371 is closed between West Hill and Gibbet Road. Motorists are urged to avoid the area.

"Anyone travelling to the Glastonbury Festival on the A303 eastbound can take the alternative A36/A361, A350/A361, or continue past the A371 and take the A359 or A37.

"If you saw the collision or have any other information or dashcam footage which could help the investigation, please call 101 giving log number 130 of today, June 26."