To give you an update, the car is booked in next week to a specialist, so we'll see what is up.
The rough idle / rough running is so bad now, that even turning the car off / on again doesn't help as much as it used to. Oddly when it is running up to 60mph after engine restart it is generally smooth, but between 60-80mph very rough, and then 80+mph smooth again.
There is also a serious oil leak that needs fixing that will probably require engine removal.
The specialist said they may be related but who knows until he has had a look.
One thing is for sure, if I am going to keep this baby, I better learn how to do more myself, otherwise it will bankrupt me.