Wasps. Ok, they're Goog Guys, and the nest behind our (terraced) neighbours sofit hasn't bothered us this summer. But now the mornings are dark (I'm eating my breakfast at 6:40) and I have the light on in the lounge, we're getting dozens of them clustering around the windows, and also coming in through the Velux vent in the bathroom window, as they go for the lights. And they leave some kind of excretion all down the windows, which is unsightly. I suppose one benefit of the clocks going back will be to stop that behaviour for a couple of weeks.