Just done a few little checks as advised.
1) Revving the engine.. seems to move back as expected but moreso on the gearbox side... so it sort of looks like it's twisting a little, not a lot but noticable when you look at it. I did a vid but it's prob crap, will upload it later. But the engine didn't move around an excessive amount which is a bonus haha.
2) PCV pipe whatever it is, assuming it's the main chunky pipe underneath the inlet manifold, seems ok from what I can see without taking the car to bits to look properly. Had a look around at some other pipes and everything seems ok bar a pipe near dump valve which is a cut in it, which hasn't gone through yet but still will need replacing to be safe.
I got down on the floor and noticed a load of scratches though where the clutch dude had the bumper off and obviously rested it on the PAINTED side! So one rub strip has a load of little scratches full of oil and crap, annoyed

Bumper was resprayed not long before I got the car!!!

Hopefully will T-Cut out, gonna get some opinions tonight.
We thinking with the more movement on gearbox side of engine that the dog bone being swapped could sort it? And hopefully the jolting coming off the throttle?
Cheers.