"Remember that the average NHS employee is not going to be very computer literate"
Neither are my even more elderly cousins who nevertheless have made the transition from Windows to Linux. That includes the one who got hit with ransomware on Windows. Her data was recovered with the aid of a Linux live CD and copied back to a new Linux partition on her PC and which she now uses exclusively. Are you saying NHS staff are less computer literate than an 80+ retired hairdresser?