What I would like to know is how much would it have cost to upgrade to Linux? As a UK Taxpayer, I would prefer my money to be invested in Linux systems instead of Microsoft.
Much more than that, obviously. You don't replace the operating system, reinstall and develop specialist applications for £5 a PC. Of course, paying for extended support doesn't move you forward, so you have to some sort of migration next year.
And really, as a taxpayer (IMHO), you (and I) should be wondering how the NHS managed to piss £10 billion away on a failed IT project, and how we can avoid them doing it again. £5 million across the whole of government is fairly small beer to keep existing systems going, compared to the amount you could blow on a load of migration projects.
It sucks that some departments are going to miss the deadline but the questions I'd like to know the answer to are 'what are their migration projects for next year?' and 'are they on track to be completed before the extended support runs out?'. Have they got a credible plan, and it's just slipped a little, or is it a total fuck up? That, to me, is the big money question.