(T) Carrier Bag Noise???

Hi....

Just hit the motorway at 65mph today and heard a noise like a carrier bag trapped near the front of the drivers door ... the noise got louder as accelerated to 80 mph and then receded once I dropped back to below 60mph .... anyone else have the same noise ... it's v.irritating and I've checked and it's not a carrier bag! .. Think it might be the wheelarch protecter that's lose....

Have you got a skyroof ?
Mine does the same, and it's the drain pipe from the front of the skyroof flapping. Oddly it's intermittent, and NOT covered by the third year warranty. I was quoted £70 to drop the headlining and fix.