I suspect he's the reason why we've had to keep them going for so long Tony

I did forget to mention, of course, that we've had to provide significant input (and spares), on PMs, to keep them operating reliably.
At least spares and support (sic) are still available after all this time, which is more than can be said of many other monophasic defibrillators of their generation supplied by other manufacturers, eh?
We're just gearing up to commission about 50 Philips MRx Biphasic AED and 50 Philips FR2 Biphasic AED model "first-responder" defibrillators on our site, so sadly I will have to wave goodbye to the LP9.