I’ve had my 2016 SD V8 L405 about six weeks. It’s fine 54000 miles. Driving to Somerset and back (about 100 miles each way) I’ve noticed a slight drone at 50 mph+. This is only under load and disappears when decelerating. It’s very quiet and only just noticed it. The tyres are recently balanced and everything else is in order. It does this in straight line and doesn’t vary on left/right curves in the road. The car is running Pirelli scorpions on 20 inch rims if that helps. Could this be something simple or common? (Hope nothing serious 🤞) "There is no replacement for displacement" - W O Bentley