Hi all just wanted to share an update.
Due to this response from FKisby and the further info provided as a result by the superb Marshall jaguar (service manager Phil) my issue has now been resolved.
From a simple email to Marshall jaguar, they were able to match my symptoms and reg to a service bulletin JTB00483V6.
This bulletin states the symptoms as a ticking noise transfer from the high pressure fuel pump via the earth strap to the cabin, due to a solid earth strap that has been used rather than a braided flexible strap. The fix is to replace the earth strap.
I cant thank FKisby and Phil from Marshall jaguar enough. Thank you