Migration data from patient registers

• The Patient Register Data System (PRDS) is a compilation of all HA patient registers in England and Wales

• ONS compare records in one year with those of the previous year by linking on NHS number enabling identification of each person who changes their postcode

• Transition data (like census)

• Patient register data and NHSCR data combined to produce estimates of population movements for mid-year to mid-year periods for local authority districts in England and Wales by broad age group

• These data now available through the Web-based Interface to Census Interaction Data (WICID)