Address records are probably used in most database, but I\'ve seen a number of slightly different sets of fields used to store them. The number of fields seems to vary from
The Post Office suggests (http://www.postoffice.co.uk/portal/po/content1?catId=19100182&mediaId=19100267) 7 lines:
They then say you do not need to include a County name provided the Post Town and Postcode are used.