Driving along the motorway yesterday at around 70mph when there was suddenly a loud siren like noise from the front of the car? I pulled off the motorway and looked over the car but everything seemed fine. It was a very windy day - could it have been something to do with the front spolier catching the wind? It didn't happen again

 

Could be the under tray not fastened properly after the last service or spoiler

 

door frames or wind getting in between a trim id emagine