Concerning The Royal Blackburn, I've just received an outpatients appointment, just the usual time date etc., but on the back there was a update your details, plus asking about your ethnicity as in the the box if your white British, outer-Mongolian etc you get the drift
then at the bottom there was this notice headed Overseas Visitor Policy, which read
There are national regulations about who is entitled to free NHS Hospital treatment and it is in the interest of the public that all hospitals ensure these regulations are enforced. If this is your first visit to this Trust you must provide proof of residency in the UK and this must be produced when you book in for your appointment.
This must be two separate documents from the following list:
Birth Certificate, Utility Bill, Bank Statement, Passport, Entry Clearance documents or Ancestral Visa
Can't say I've ever seen that before, especially the bottom bit about overseas visitors