Thanks for the suggestion, I thought the same, I'd had problems with the engine "coughing" and I thought it had probably ripped a mount apart. I did find that some of the bolts would tighten up a smidge but nothing else - the rubber bits of all the mounts were new last new month when the engine & box went back in. I've even tried lifting the engine until the front wheels of the car are off the ground and all seems OK so I don't think it's the mounts.
What I really need is somebody to sit in the engine bay while I drive it, to see where the noise actually comes from
All being well I've got a day to myself on Wednesday so I'll give it a good session of looking at and see what I can find.