The mechanic we use who by the way knows his stuff said the other day that the anti shudder valve was sticking....
Well he was correct and he found out why...
The anti shudder valve as a recess where the gasket/seal partcially sits in.
Well the previous owner must have had somebody look at the car and didnt site the gasket/seal properly hence it was spraying oil very finely like a mist...
And through that hole it was sucking in air....
So once the engine was warm during the day the gasket/seal was holding..
As it was sat over night and cooled down it just sucked air in hence a reason not to start..
The anti shudder valve was literally gunked up and wouldnt work properly...
A new seal as sorted it and a good clean of the valve..