11th August 2010, 09:47 PM
you'll probably find that every local authority in the UK uses either MapInfo or ArcGIS as the base for its HER and HLC, usually depending on what their using for their corporate GIS. Bigger units and consultancies usually use either (or both), smaller units tend to baulk at the price. AutoCAD map seems to be increasingly popular though less so than the others, and there are lots using open source which always include some interoperability with the more common commercial platforms...