This is an absolutely classic example of why NHS — no actually not just NHS, but all government — IT projects fail so spectacularly.
There are a couple of telling comments in the report on the NHS decision to quietly close the “Choose and Book” outpatient appointments system.

During a recent investigation … MPs were told by NHS staff that while some GPs liked Choose and Book, many did not, and that not all outpatient appointment slots were available on it, limiting its usefulness.

Whether GPs like it or not, that’s the process they have to use; so get on with it and then get it improved. But not having all the appointments there is inexcusable. And the appointments aren’t there; I’ve recently had the run-around getting an audiology appointment because Choose & Book can’t get their act together. (And to be fair my GP went ballistic because of the inefficiency.)
But then it gets worse …

NHS England said … the new e-referral system would use different technology, but it was unable to say how much the scheme would cost.
(Emphasis mine.)

This is the crux of the matter. If you don’t know how much a project is going to cost, then you do not have a project because you cannot commit funding. There are three prerequisites to running ANY project: a sponsor (ultimate responsibility), a coherent defined and documented set of requirements (the job) and committed funding (ability to pay). Without all three there is no project. Ever.
And government never provide any of the three. They are totally unable to define, specify, cost and manage projects (and they will not take sensible advise from their suppliers). The right level of funding is therefore never committed. And no-one takes overall responsibility.
So things either never happen (because suppliers won’t accept rubbish contracts) or they go tits up (because what is specified either can’t be delivered at the agreed price or isn’t fit for purpose).
So it seems likely that this new project will either be stillborn or will fail within three years. And that is our money — our taxes — down the drain. Again!
Why is there no-one in government, the civil service or parliament with any teeth?