Jeez.
Looks lie a crypto-locker kind of infection.
Spreads like absolute wildfire and will genuinely wipe out all data it gets access to 'unless ransom is paid' - which is absolutely no guarantee/solution anyway.
Possibly unrecoverable on MS Server OS either way.
Major, major f*cked-ness.
If one was cynical and imagined that 'TPTB' UK wanted rid of the NHS. Oh .. here's another big nail.