The address_person method (and the AddressPerson class in the Java/JSP library) has been augmented and the parameter "premises", previously mandatory, is now optional. If the premises is not entered, or does not indicate a unique address, the method returns a free (no charge) list of premises at which there is one or more person. This allows the final user to select an address from that list and to re-submit the method, using that text as the "premises" value. This also assists with the difficulty of specifying a house name or number when the method is used with flats - a definitive list of available addresses is returned for free as an optional first stage.