Turns out to be low compression cylinders 1 and 2. They have told me they want £850 to take of the cylinder heads, just to have a look and then tell me exactly why I have low compression, thus costing more money after that. So with the £150 diagnosis. It makes it £1000 down and then finding the problem and whatever that costs..
The dealership prices for repairs are ridiculous. I will be taking it elsewhere to be looked into further.
I had my oil changed and filter replaced the day before it went but the job went smoothly... This is gonna get expensive..