Thanks Wimblowdriver, investigations will commence soon!

Almost certainly a boost leak. Check all the hoses between the turbo - intercooler - throttle body. Some are difficult to access for a thorough inspection especially the 90 degree bend onto the throttle body as it is behind a birds nest of...

Thanks for the thoughts guys, that gives me something more focussed to google.

And the boost fail could be from something as simple as a pipe that has split or come off. Whooshing noise points to this, had it happen on a car once and power was gone.

Sounds like a turbo boost has has failed, quite common on all turbo cars.

Hi all, New guy on the scene here so apologies if I'm in the wrong area, but really hoping that someone might be able to point me in the right direction. . My 2012 Defender with a 2.2 Puma powerplant has been making 'whooshing' noises whilst...