Great new fellas,
VW Crosshills called, they have started work on my car 3 days early. They have indeed found that my chain was slack and needs replacing.
The better new its not going to cost me a pennie. VW will pay for the part and the warranty company will pay for the labour.
I cant speak highly enough of VW Crosshills, after speaking with Ben on the phone for 15 mins (who has a MK5 GTI) i feel totally at ease with them working on my car and if anyone lives within 50 miles of them i would defo recommend traveling to get great service and peace of mind.
Can finally stop stressing