The most extensive revision of Navigator® Britain for 10 years brings radical improvements. It now shows speed-camera locations, with their speed limits, and provides over 3,000 road names as well as numbers. It also includes a massive selection of 70 fully indexed town centre maps, plus airport maps and port maps, new detailed approach maps, new London main roads maps, new detailed route-planning maps, a distance table and a 43,000 name index which includes places of interest. The main road maps are at 1.5 miles to 1 inch (3 miles to 1 inch in the Scottish Highlands) and are clear and detailed, showing even the smallest roads and lanes that are omitted from other atlases. Over 3,000 roads are named and every roundabout, junction and slip-road is shown in detail on main roads and motorways. Thousands of tourist attractions and places of interest are shown on the maps. The alpha-numeric grid is based on the National Grid, so that the atlas can be used with GPS systems.