The lorry has blocked an area of the major road near Easton and the Mattishall roundabout.

Drivers have been warned of delays of at least 15 minutes and to add extra time onto journeys between Norwich and Dereham.

READ MORE: Week of abnormal loads to cause delays on Norfolk's roads

Long tailbacks have built in both directions with congestion from Honingham to Longwater.

The incident was first reported at 11.49am.

More to follow.