We were called to a lovely residential home in Acklam, the owner had a wasp nest under his roof tiles. He had a daughter who was allergic to wasp and bees sings and very rightly worried about her becoming ill if she was stung.
The wasps had built their nest in a hard to reach place and were very aggresive.
As always a very quick reply was needed however this needed to be balanced against the risk of upsetting the wasps and anyone being stung, especially his daughter. So we went to the property at last light when the wasps were at their least active and less likely to sting anyone. Once we had secured the house, using a large lance and potent insecticide dust we treated the nest and retreated. The problem was dealt with and no one came to any harm.
When dealing with any wasp nest you should always do it, either first thing in the morning or last thing at night. This reduces the chance of you, other family members, neighbours and pet dogs and cats being stung by the angry wasps that will try to protect their home.