And yes, I can see the possibility of some hardships following Brexit (assuming it happens) but I view the possible benefits as being of greater long term value. (in answer to DMcG)

Well that is certainly a start, Nigel, but it is a long way of identifying any personal hardship, staring it in the face, and saying "If needs be, I will pay that." We know the number of nurses and doctors in the NHS has fallen because of Brexit and immigration policies . Are you willing to say to friends and family I know this is delaying your treatment but I think it a price worth paying?