Yes, the oft-mentioned "Arborfield model" was indeed a good one, but I doubt that it's "easily emulated", unfortunately.
By the time guys turned up to be trained as biomeds (at Arborfield) they were already at ONC level, with a few years of experience (working on the green kit
) behind them, and were also (and this, to my mind, is the important thing) of proven ability. They were volunteers, incidentally, and had to have been recommended as being suitable (not every tech is, or was).
It seems that in civvy street, and the NHS is the prime example of this, managers are looking for "ready made solutions", or if you like "off the shelf" technicians, without having to bother about training, mentoring, "bringing them on" ... or whatever you want to call it.
What is needed (and obviously so, I would have thought) is a National Hospital Engineering School (Academy, College ... whatever), where suitable raw material gets fed in at one end, and (probably a couple of years later) technicians, electricians and all the rest emerge from the other!