Bloody horseflies/tabanids/clegs. This wet spring then hot summer has been the worst time ever. They literally tear into your skin to get at your blood. I've been bitten hundreds of times and the little buggers ignore both deet and citronella. Luckily my bites itch like mad for an hour then I'm ok. Mrs Steve's bites last for days and she's reluctant to go outside. I've had at least two or three bad mozzie bites at a time for weeks. They take days to settle down. Asda sell little tubes of "bite and sting relief" cream for £1.50. It contains hydrocortisone, bad I know, but it gets you through the night!