Archaeologists in Hereford (Herefordshire, England) have discovered a Bronze Age earth ditch which much later may have marked the boundary between the king's land and that belonging to the church. A combination of aerial survey and laser scanning was used to find the ditch as it only appears now as a slight depression, 5m (16ft) deep in places.
     The ditch was used by the Normans to define who should pay taxes to the king. This find, together with recent digital mapping of Hereford, confirms the belief that this city is one of the best preserved city centres in England.

Source: BBC News Channel (20 April 2010)