Dear DUmmies,
I've been to the UK a couple of times. I asked my PCP the first time I went there if he had any recomendations should I become ill there. His advice? Wait till you come back for treatment.
And as far as this country goes, not having health insurance is, in far too many cases, a CHOICE someone made between having that, or having sattelite cable, X-Boxes, bigger cars, dinners out, etc.