>> Try the local council website and ask the Pest Controller to come out.
I've not found that to be necessary. Over the years I've satisfactorily dealt with several wasp nests with whatever insecticide powder I happened to have to hand at the time ~ Ant Killer, Wasp Nest Destroyer etc. For nests where the wasps went into the roof void via a gap at the edge of the soffit I fitted a piece of flexible PVC tube to the outlet nozzle of the puffer bottle and then turned the bottle upside down before doing the puffing. One application is generally enough although it may take a couple of days for all the wasps to be killed. Mature wasps get the powder on them when they leave the nest the next day. Wasps born after the application of the powder may take a day or two before they come in contact with the powder. Wait until it's dusk before approaching the nest ~ the wasps all go back into the nest as it starts to get dusk.
Last edited by: L'escargot on Wed 21 Apr 10 at 15:26
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Wasp nest 
Wasp nest 