vRS CR Engine Rattle

Hi guys, well my 5 month old vRS has developed a rattle !!! Goin to be sending her in for warranty work but wondered if anyone else has had the same problem. When the engine has warmed up Im getting a noise like a loose heat sheild. Had a look at work quickly and it seems to me to be the flexi pipe off the dpf/exhaust. Has like a wire mesh netting around it that could be the offending item. Any ideas or first had experience would be appriciated.