GP Practices have a contractual duty to provide emergency and immediately necessary treatment, free of charge for everyone. They cannot refuse to register someone because of:
any ‘protected characteristic’ under the Equality Act 2010
other grounds such as social class, appearance or medical condition (NHS constitution)
should register patients without requiring any documentation including proof of address.
Despite this many marginalised groups in society, such as the homesless or the Gypsy, Roma and Traveller communities face some of the most stark inequalities in access to healthcare in England.