Horse flies

Hi all, We have just returned home from a very enjoyable week spent in Lincolnshire. The weather was lovely. The only drawback was the biting horse flies. We had taken insect repellant with us which probably had some effect but some did get through. So both my wife and myself have several bites.          

What do other people do ? Is there a product on the market which is brilliant at keeping these pests at bay. We have used Anthisan as a after bite solution. It does help abit but i would prefer not to be bitten in the first place. I would be interested in peoples thoughts please. David