Whistling noise V12 Vantage roadster

[Ex Boy Racer]

Hoping someone can help me...
Had the above for a couple of months now. Recently it has made a high-pitched whistling noise inside when I turn the ignition on. It continues when I drive, but it doesn't happen every time.
The noise is a bit like the whistling you get on a radio when it's not tuned to anything.
Going into the dealer on Thursday, but a heads-up prior to that would be useful.
Thanks

[CSK1]

Something like this?

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

[Ex Boy Racer]

I wish...
Sounds like the noise in this
https://www.youtube.com/watch?v=RJoaCywHjlg
except mine happens when radio is turned off...

[CSK1]

There's definitely something wrong there, your V12 Vantage shouldn't sound like an old Ford! :-)