Sorry for lack of any feedback, life's gone a bit crackers and the car doesn't seem that important anymore, and thanks for responses 👍
Had MOT recently it sailed through, also had oil and filter change done as well, after this was done for a few days no smoking at all, then it came back again it has a slight blue tinge to it, only happens from a cold engine start up this happened for a couple of weeks and now touch wood it's not smoked at all for several days now.... baffling !!
I'm thinking with the age of the car it might be wise to just live with it, it drives fantastic engine is so smooth, could treatments do more harm than good ?
Might give the rocker cover gasket a go how much was this to do if you don't mind me asking ?