It is already clear that only some NHS services will remain based on clinical need. The British Medical Association noted in 2012 that rationing was already beginning to put some patients’ health at risk. http://www.guardian.co.uk/society/2012/aug/31/nhs-rationing-risking-lives-doctors-leader. By 2015, there is evidence of widespread rationing (see, for example, http://www.telegraph.co.uk/news/nhs/11771294/Hearing-aids-and-vasectomies-rationed-as-NHS-pressures-bite.html ).
Promises that health care will remain free at the point of use are entirely consistent with a healthcare service based on private insurance.
Following the 2015, there have been moves, such as a debate in the Lords, or speeches by the Health Minister, towards preparing the public to accept charges for health care. https://www.opendemocracy.net/ournhs/richard-grimes/government-moves-to-consider-nhs-user-charges .
What is happening to the NHS can be seen as a larger plan to shrink state provision. The way things are going, within the next five years, Britain will have a smaller public sector than any other major developed nation. http://www.guardian.co.uk/commentisfree/2012/oct/15/graph-cameron-wants-shrink-state