The Somerset Collection - Postcode Centred set of 3 maps. Historical-Aerial-Ordnance Survey.SET OF 3 MAPS Historical Ordnance Survey Aerial Photography. See the difference in your local area with this x3 map set. Highly detailed Postcode Centred Ordnance Survey map These Postcode Centred maps are available for EVERY school in the UK These maps include ALL streets and individual houses within your catchment area! Most up to date mapping available! Option 1 The map is mounted onto 3mm PVC Foamex to mount on the wall internally or