[ktetch]

ok, had some progress.

I finally got the plenum off (had some MASSIVE problems with the EGR stuff)

The PCV valve was completely crudded up. I mean dead blocked.
EGR passage was so fouled it had maybe 1/4 the bore left.

Also, checked the injectors.
all were above 12ohms except #6 (diver side, on the front) which was 1.4

Those two things my cause of the non-firing?

*edited to add*
Oh, and there was a nest in between the fuel rails, made using insulation from the under-bonnet insulation. lots of acorns too. they look fresh. Wife was off work from the 24th to the 31st of may, so it wasn't driven, when she drove it on the 1st, that's when it died entirely.
I really hope this is everything....