Trouble is I can't really see how the NPPL will save anyone much money. Ok, it'll encourage people to fly who couldn't have done due to medical restrictions etc, but this could have been solved by simply the 'national medical' idea suggested earlier. Besides, most people failing a JAA Class 2 will probably pass the FAA Class 3 ("hop on one leg 20 times, lets listen to your heat, yep you're fine"), so you could theoretically still fly in the UK in an N Reg plane.
You may save 5 hours training over a JAA PPL, your medical may cost £25 instead of £100 for the initial, and the admin fees may be say £50 as opposed to £150 or whatever the JAA issue fee is, and exam fee's may be £100 cheaper. So now you've saved £600 or so, on training costs. Now what? You can't go and rent a PA28 for a discounted rate as you hold a NPPL. So in the grand scheme of things, and especially where flying is concerned, £600 doesn't go a long way.
What really needs to happen is for serious savings to be possible to make it worth while. If a prospective student could save £2000 over a JAA PPL then it may be worth doing. For example, make use of 'free' PPL instructors, so no instructors fees would be payable during training. I'm sure there are many JAA PPL's out there who would love to instruct NPPL's for free, though of course this would **** off the regular FI's.
Trouble with the NPPL is once you get it, you're stuck to flying in the UK, which to be honest is not the cheapest place to fly. If you love flying and want to get good without paying through the nose, then the States, SA etc are all very good places and with the NPPL you can't fly here.....
Cheers
EA