I read this, in last weekend's Sunday Times.
A small proportion of the money owed is linked to patients from the Isle of Man, which is a dependency of the British Crown but not part of the UK. Isle of Man residents do not automatically qualify for free NHS treatment. Other debts are from patients based in the Irish Republic.
The NHS has also struggled with the number of Welsh patients using English hospitals designated as centres of excellence. Wales controls its own health budget.
Health tourists’ debts cost NHS millions - Times Online
Cheeky Welsh beggars.
Build Offa's Dyke even higher, and if they still manage to get across the border, from the land of green valleys and free prescritions, fire syringes at 'em.