Thanks BoMW - they always generate a bit of noise, but I expect it is more noticeable in a near silent car. I am finalising the order on 17 May (dealer says it won't affect the ridiculously long delivery time) and will probably add the roof, along with HK, sun protection glass and the park assist, which I did not want but her indoors thinks will be helpful, because neither of us can see the front and they won't let you have front sensors without a hugely expensive package. We already have the professional nav (just missed the freebie), winter pack, DC Prep (we will be doing Bristol to Plymouth several times a year, so hope Ecotricity put those fast chargers in to the services by October) and 428 wheels. I would have liked the cruise control to be intelligent (i.e. slow down when a car gets in the way and speed up after, but refuse to pay £790 for the driver assist package just to get the sensor that other manufacturers provide with their cruise systems. I think they would sell far more if they made the various extras available separately instead of in stupid packages that contain things you don't want.
Really jealous that you have taken delivery - we have been told October (from mid March). Enjoy the sunshine!