Information on the month of last activity was used to quantify the likelihood that a person still resided at the address associated with the UPRN. In addition, BSO-IRU also supplied information on (a) whether a person lived at the same UPRN in April 2010, (b) if a person's record was transferred from GB or was newly registered (5) in the previous 12 months, and (c) the person's country of origin for those who were newly registered since 2005.
In short, the first part of the methodology consists of placing persons at non-returning Census addresses, matched on the UPRN, followed by a quality assurance on the accuracy and consistency of the created households.
BSO-IRU supplied details of all live persons on the administrative Primary Care health information system who were resident at any of these UPRNs on Census day (27th March 2011).
It was also possible that due to the quality of address information, different UPRNs were identified for the same address.
AddressBase Plus contains current properties and addresses sourced from local authorities, Ordnance Survey and Royal Mail matched to the UPRN and structured in a flat file model.
The product is based around the UPRN, the current (approved) addresses; and alternatives for current addresses (reflecting the changes in addresses); provisional addresses (proposed planning developments) and historic information for addresses (including historic alternatives) where available.
With this, technical staff can begin to familiarise themselves with the format and structure of the data, whilst non-technical staff can begin to adapt to elements such as UPRNs and property classifications.