This field, which is derived from the patient's postcode in the field HOMEADD, represents the 2011 Census lower layer SOA code for England and Wales, SOA code for Northern Ireland and data zone code for Scotland. Pseudo codes are included for Channel Islands and Isle of Man. The field will otherwise be blank for postcodes with no grid reference. N.B. this field remains blank for Scottish postcodes until this information is released. The first character is either E for England or W for Wales The next two characters are 01 for Lower Super Output Area and the remaining six characters make up the unique 6-digit tag for each zone.

lsoa11