Refusing to deny it tells that it is very much a possibility- and as said, lots of it has already been oursourced/sold.
She has refused to deny the NHS may well become a bargaining tool, and available as part of deals. Again and again, and since January 2017 at least.
Repeated, again and again. There is so much out there for anyone who wants to de a bit of research. I've picked this article, from The Mirror, so as not to be accused of being a 'Guardanista' - from 7th of February- just one... and there are so many since:
Theresa May has sparked a furious backlash after she refused to guarantee she'll protect the NHS from US business interests in a post- Brexit trade deal.
'Asked to make the pledge today, the Prime Minister said it was too early to tell what Washington negotiators would demand.
Instead she said Britain's priority was to "get the best possible deal" - leaving the health service ripe for exploitation.'
The link from 3 days ago was paywalled- so I could not copy it, or provide it. But it said about the same, eg - that there are NO guarantees the NHS won't be part of a deal or deals.
In the meantime, it has been announced that tax relief on pensions will we abolished to pay to keep NHS afloat- because yes, if you are going to sell a utility, be it NHS, or gas or water, or nuclear power, or whatever- you have to fund it to the last minute to be 'attractive'. Our kids will, again, pay for it- those very kids whose future pensions are already very poorly funded.