After last week's wasp post, I thought you, dear reader, would like to know how the 'Take Back The Garden' movement was doing.
I'm sorry to say that I did indeed resort to chemical genocide in this instance. It would have been lovely to just wait for some passing hungry badger or honey buzzard to snack on my colony of stripey invaders, but as I'm not in a rural location I'd still be waiting for that to happen some years down the line. So action was took, and 2 cans of spray foam later plus disturbing at least part of the nest, I think I have got rid of the infestation. Wont know for sure until tomorrow morning when I attempt to dig the final patch of soil, but there were no wasps flying around the final entrance hole just now.
The nests themselves are a thing of beauty though. If you've never seen inside a wasp nest (and why would you!) here's the top half of a chamber: