Thanks Both,
I'd already sent a quick message to the dealer so I'll see what they say but sounding like it's something I'm going to just have to get used to. Real shame as other than that (and the odd software hiccup) I'm loving the car.
@stephen1612 I thought about getting the brakes bled too but having tried pumping the brakes a couple of times while stationary there is no obvious change in pressure which I believe is the tell-tale sign of air in the system. (I'm certainly no mechanic)
Ho hum, fingers crossed after a few more miles it might tighten up a little,