I don’t believe anything from UK. Their health care “NICE” is notorious for denying/delaying approval of treatments for patients with rare diseases. Italy was flooded with patients from Euro zone that needed these treatments (there were three examples of expensive drugs for rare diseases that I recall) because UK would not pay. Much poorer EU countries are better places for health care than UK.
Sorry it’s a bit personal, but I would not step foot in UK nor believe anything they say. Good riddance for the EU.