Ok, so as we know my old lady is nearly there - new suspension, cambelt, pulleys, brake hoses, and just a fuel leak, wheels to source and wiper arms to refit (need to find out about this sealant you're supposed to use to avoid the coil pack getting wet/damaged) I have slightly rough/lumpy idling again. I've shield away from running her until after the cambelt was changed. This is now done, so I can re-investigate.
It
could be the coil pack which has become damaged with water ingress or...
Given that the car was laid up originally because 'it just died' one day (and was eventually traced to a dead crank sensor) a new one was subsequently fitted, by which time she has been replaced with a FL

, and never run again.
but What if that was the wrong sensor fitted? It wouldn't necessarily show up immediately, and the 5-6 months she's been idling once or twice a week must surely only add up to barely a week or two's normal driving, in terms of minutes of engine running time.
What do we think? Either way it's two potentially expensive things causing the lumpy idle (which goes away over say 1500rpm) so I'd rather not just pop off and buy a brand new DIS pac and crank sensor on a whim - especially if it ends up being something like a wire not plugged in properly, you know?
