ubiquitin, My information comes from reading the government websites and the very few people that I know that needed surgical intervention.
However, I believe that the doctors, not the patients decide on what is an emergent procedure. From what I understand, once one is in the system they have to wait their turn.
I was involved and familiar with a few cases of which the patients were flown to the US from the UK for more advanced life saving treatments. One of those cases was even done on Shabboss. Over here the patient was able to get the care they deserved while back home they were not.