It also sometimes happens when I ease off the gass, so I guess mostly when the revs drop then

Sounds like something rubbing, and slowing down. It seems to be coming from the engine bay, on the drivers side, near the fire wall. possibly at a large round item that I don't know the name of near the top of the bay

Car is a Mk3 2.0 GTi. P reg. All is working well other than that it seems.
Any ideas, or is it a feature that I will have to get used to?
Cheers.