Well guys it aint the leads!
And its getting worse!!!!!

On way home tonight it started to misfire on take up, when you have slowed slightly and then go to just give it a nudge to pick up again.
Have trawled through other problems in various threads on here and what about the mass air sensor?
Now i've got a feeling I had the same problem with my Mi16 but that was a while ago and I cant really remember, but that has a similar devise on the inlet manifold?

??
Clutching at straws here!