Ok not long ago an evangelical guru was appointed to migrate the NHS to open source.
Microsoft responded by making their licensing terms more generous.
The NHS accepted hinting that this was the plan all along.
NHS procurement is a corrupt, incompetent, bunch of bureaucrats who get things that they do not use themselves (software, drugs, implants) by putting out a tender, and waiting for the vendors to do their marketing. Those with the fanciest presentations and the biggest kick backs get the deal.
Ref: NP4IT, Microsoft NHS deals, Darent Valley and Pembury Hospital PFIs etc.