Well i'm happy to say the vibration noise above 6,000 has been fixed.
Big props to Jaybee's in Banbury, bought the car there just 3 weeks ago and they have now fixed this in under a day. They didn't have a courtesy car available, so Nick gave me his personal work car, which was a top of the range Renault Wind with heated leather. Can't beat that for service.
I've only done 25miles on the way home, but was sure to take it to the beep and listen for any vibration.. but I couldn't hear any
Lets hope it stays that way.
Apparently the cause of the problem was air con pipes vibrating against the bulk head... just in case anyone else is having the same problem.
I still have the noise on lift off above 6,000rpm but have since found out this is normal and there are loads of threads on the RS forums about it. Its the secondary air inlet or something!
I'm a happy bunny... for now
Thanks for the help guys.