Thanks for the responses guys, the noise does disappear more or less when I’m in eco or set to eco in individual which is good, it genuinely didn’t sound like a noise that could be caused by the soundaktor. I’ve booked it in to Pulman who are about 30 miles away but £66 less for the same service so least that covers the fuel and a nice excuse for a daft blast out. Always interesting to see what courtesy car I’ll get as well. Could be fun to drive an up!
Also in response to my specialist I use Vasstech, they have 3/4 sites now. I’ve used them since they started up.