Better solution for the U.K.. Dump Windows and go with Linux. http://www.securityweek.com/microsoft-withheld-update-could-have-slowed-wannacry-report
Yeah because using a 16 year old Linux O.S. would have prevented this from happening.... /s It's not the O.S. at fault here, it's the management's fault for not having a better upgrade schedule, whether that is Windows or Linux, doesn't matter, still needs to be done.