Thanks, Mark.
Not my finest week. That mysterious stalling came back last weekend. I WD40'd everything and after a while, it started. Well, it did it again on Tuesday morning, but the WD40 didn't work. So, Helen and I had a fun time at 7am pushing it out ogf the drive to get her car out so I could go to work. (I had to frisk her for a lighter, in case she made good on her promise to set fire to it!

It is now back in its 'spot' in front of the carport.
I think the stalling might very well be the crankshaft sensor, and at 40 bucks, its an easy fix, and if not, well, its only 40 bucks. I'm even gonna do it myself (gulp).
Anyhoo, the rad fan is a problem (who's the electrical expert again?), and without that, I would imagine it should be running a little hotter than normal, even in the cool weather. The hoses all get hot though, so I think there is a reasonable circulation, but I'm not sure if its enough. Hence the concern. Its not an urgent thing, but I would feel happier if it was done. So, where do I get a good pump cheap? (fnaar fnarr oo...err sounds a bit rude!)
BTW, whats the 411 on your emissions issue?