Hi Put
I was at Cov last Saturday and saw ( for the first time) an airfield service vehicle broadcasting birdsong (hopefully not the mating call
) to repel any unwanted avians.This didn't seem to work as next they were firing pyrotechnics into the air to shift them.
Point is,their presence was probably reported by a pilot ( you maybe?) which must be good practice.
BTW,you going to Dux on the 3rd?
MM