Minister in Sci-Fi land again
From the way the BBC article is written it certainly seems the minister favours some kind of GPS satellite tracking system which would suggest that he's yet another Government minister who has got the whole thing back to front and thinks the satellite does the tracking rather than the receiver figuring out where it is relative to the satellites.
If you're going to get any useful realtime data back from the tracking device it'll need some kind of transmitter - presumably a mobile phone type device. Which makes the device quite bulky and likely to annoy and confuse the already confused dementia sufferer.