Hornets

Not worried about them as they're magnificent beasts, but, I wonder, has anyone else been receiving visits from hornets this last few weeks.  I didn't realise how much of the time they fly at night.  Sitting here now with the windows closed bar a small vent for air, because I had to remove six the other eve (glass and paper method) as I just didn't fancy going to bed with that many gently patrolling the warm air round my bed! Must have a nest site nearby, several at the window now.
H-C