They are doing their job (at last) making sure healthcare tourists get billed
http://www.nhs.uk/chq/pages/1087.asp...categoryid=162NHS hospital treatment in England
If you move to the UK, you will not be charged for NHS hospital treatment from the date that you arrive as long as:
you intend to live permanently in the UK, and
you have the right to live permanently in the UK or have a "route to settlement" that will allow permanent residence in due course