A Bronze Age earth ditch has been found in Hereford which archaeologists say may have been used to mark the city's old tax boundary.

It is 5m (16ft) deep in places and was found using aerial, laser scanning equipment to map the land's contours.

The ditch has been filled in with earth over the years and now resembles only a slight depression at ground level.

It runs from Aubrey Street to the River Wye via King Street and may have marked the limit of the king's jurisdiction.