* Update *
Had it on the reader at 2 garages and both say no fault codes are showing or can be cleared.
Explained the problem around how car seems to cut power up the revs and he wonders if it has 'Jumped A Tooth' and now the timing is out?
He said that could be why the reader shows that acceleration is in the -numbers and not advancing?

Does this sound like anything you could advise on?

Thanks in advance