A LC sector was one of 2 special postcode sectors created for 2011 Census Output.
A postcode sector comprises all the unit postcodes that have the same identifier except for the last two characters. Special postcode sectors are created for census output to ensure sectors conform to a minimum threshold and do not cross Council Area boundaries. LC sectors have a minimum threshold of 20 households and 50 persons, the same minimum threshold as Census Output Areas.
More information on Local Characteristic Sectors can be found in the 2011 Census Geography Background Information note within the 2011 Census Supporting Information section of the NRS website.