Worrying noise!

Took the car for a thrash today and when I was reaching 6000rpm and above a really loud rattle was coming from the engine, I have heard of people talking about a rattle when reaching the limiter but I never heard it until today. Didn't sound right at all, any idea what this could be? Dealer job? Cars done just under 15000m.

Cheers
 
checked the crimped cover on the engine mount top left of the engine bay, mine was loose and caused a rattle, got changed Under warranty
 
this is the top engine mount, like ryan said the cover comes loose causing a terrible rattle, had mine done under warranty too


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