3 times today I've had the car behind me sounding their horn. Obviously the driver doesn't think I should have been sticking to the 20 mile and hour speed limit. The 3rd time was when I waited for someone to come onto a roundabout before me - they had priority. But no, the person behind had to sound their horn, so that they could join the traffic queue immediately afterwards.
I hardly ever heard people sounding their horns before covid, now people do it all the time.
What's wrong with them (or you, if you're one of them)?