Update: One lane of the A34 re-opened to cars only following accident

Police were called to the scene at the Grace’s Lane junction at Chieveley at 12.07pm to reports that a caravan had jack-knifed and overturned on the carriageway.
The Highways Agency said the road is expected to re-open by 3pm.
Update: at 1.30pm, the Highways Agency said that lane two had re-opened but to cars only.
Other vehicles are still being diverted at the scene.