Widn, I was there whgen it rained. This was before the huge channel dug passed Travellers. The water cascaded through the narrow trench dug by PSA in the camp which then washed away the ground around some huts. The road to the airhead split length ways, the bridge on the road too Cricket Valley was underwater. The sports pitch in Georgetown was also riven with channels. Over 4 inches of rain in one hour on Georgetown.
I guess the airfield would have been black for a couple of hours.