yes Hamlet, me too although not this year. thought they were flying ants too. this was in a pub garden, i wont say which it wss,i was bitten a lot. they seemed to just drop out of the sky on you right? plop bite! one landed on my sunglass lens and for a really short time my eye seemed to focus on it, a plump little abdomen it had. thats when i realised it wasnt a flying ant. I think we have them for a very short time each year. At about 8.30-9pm they go into attack mode, if they werent b4. Thats when i noticed they are now biting. The bites took ages to heal and got nastier for a while before quietening down. My neighbour got a reaction to them.