Hi guys got a 56 plate facelift interior 4.2 supercharged which has a rather annoying bearing noise/ tensioner when cold which goes after around 5 mins of the car running, anybody got an idea what it could be? Is it common ect?

Yes it’s fairly common I believe. It the belt tensioner (it runs slightly out of true I think - happy to be corrected on that).
I read somewhere on here a while back that JLR do a modified part to cure this. Might be worth a search if you’re interested. 2006MY 4.2 SC
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