[Stone Free]

Thanks for responding Roland_F & letting me know the video was finally visible.
When re-uploading the vid I used the AVI format as opposed to an MP4, so whether that's relevant ?
Unfortunately not getting any feedback as to the possible cause of this noise issue to date, & with no warning lights or error codes apparent it's a mystery.
The mechanic seems to think it could be a faulty butterfly mechanism in the EGR valve, so I've decided to book it in & get the EGR valve changed, rather than leaving & it resulting in bigger problems.
I'll follow up this post, once the works been carried out to advise if its been a success or not.