Very successful evening being quite quiet in the middle ( urban) section. The beginning and end more than made up for it. Lots of Noctules and common pips. The latter swooping over the river in large numbers, picked out by head torches, like a swarm of midges Also we might have heard a Nathusius or two. More sonograms to analyse.
Thanks to the Viking Kayak Club and to Tim and Dave who joined Bob.