Nowhere near as much as the £12Bn the NHS spent on an impossible moving-spec IT system that they also scrapped(1). Oh wait, it's a tenth of the amount.
Choose and Book is widely in use, the Spine exists, as well as the N3 network.
Data format and transfer standards are coming into play now. So instead of one system to rule them all, it's working towards interop. Which probably should have been the overall goal to begin with.
People like to think of the NHS as a monolith, but it's really hundreds of tiny fiefdoms.
They could easily have picked ipv6 and done it the smart way. Oh how things could have been.
http://www.nao.org.uk/report/review-of-the-final-benefits-st...