Thanks for the replys guys.

Have got a bit more info, it would seem it is not the coilpack afterall as i borrowed another coilpack from my brother to get the misses car running.

But her car still wouldn't run on No2 even with a different coilpack. So i nicked a spark plug from one of the RSs unaffected cylinders.

Hey presto, her car now runs fine. This i think shows me that the RS is fouling plugs on cylinder 2, but why after standing for a week doing nothing would it do this?

I have bluefin fitted and the diagnostic shows NO fault codes on the RS, which is weird as the misses car had the management light flashing and showed fault codes following me re fitting her plug which the RS had fouled.

I will try the disconnect the battery reset route and maybe swap a couple of injectors round and see if the problem moves and then fouls a plug on a different cylinder.