Lol same thing happened to me few years back. I was jumping over a fence, to go fishing down rumney river, disturbed a nest, and got absolutely battered by the fukers, stung me everywhere, I run like fuk but they still kept coming. Vicious little kunts them wasps when their pissed off. I know you can buy stuff from places like B&Q or a garden center. But if it was me, I'd be calling the council to come out and deal with it. Fuk trying to tackle a wasps nest by myself