The queen wasps were very active here a month or 6 weeks ago; lots of small nests appeared, just a couple of cm in diameter, over one weekend inside my sheds and in the attic. I knocked them all down as they started and they've not reformed. Just one in a chimney left that I can't reach.
Interesting to see an outside nest, riggers. I've only ever seen them inside buildings, where they're protected from the elements