We tried the pompiers they would not come out unless there was a danger to life/small children, even though we did have children , as the nest was in the garden.The marie tried to find some one to come out - price 160 euro ! in the end we bought a spray for frelon nests 14 euros ish from castorama, same stuff as used by the pompiers it says on can.You can spray them from 6 meters, it is very powerful and it does work (think it was a yellow and black can) sorry cannot remember name in uk now hope this helps Hazel.