http://www.adviceguide.org.uk/index/family_par ent/health/nhs_charges_for_people_from_abroad. htm
Note you have to have been legally resident in the UK for a year prior to seeking treatment
So the Mail's use of the term "Health tourists" is misleading and I suggest deliberately mischeivous - there's a surprise!
In France the threat is to withdraw free health cover to expats who've retired to France and therefore not paid any French Social Security. If you've gone to France to work you'll be covered.
Non-EU countries don't have any automatic rights but just to complicate things there are reciprocal arrangements with some countries.
Let me not just criticise the Mail - the Times has run this one -http://www.timesonline.co.uk/tol/news/uk/health/article2374072.ece
Headlining a figure of �62 million a year before admitting that just over half of that is actually paid back.
So that's �30 million in an NHS budget of �75 billion or 0.04%
Swamping? I think not!