Part of a main road in Harpenden has been closed after a van overturned at a roundabout.

Emergency services were called to the roundabout between Redbourn Lane and St Albans Road, at Hatching Green, following the accident at around 9.30am.

Hertfordshire Constabulary said the driver of the white Mercedes van was already out of the vehicle when they arrived and was being treated by paramedics.

Part of Redbourn Lane has been closed towards the M1 while police recover the van.