You're right Steve, nothing here in UK that bites one will do much harm to health (except perhaps an adder!) In W Africa, I've been bitten to death by mosquitoes, in spite of Deet and anything else I could get my hands on. I was told they particularly love white skin, although scientific experiments have shown they're actually drawn to black surfaces, and respond to carbon dioxide exhaled by warm-blooded mammals. Thank the Lord I took Malarone (anti-malarials) unlike some stupid idiots who don't bother, and risk their lives out in the Tropics.
My feet are badly scarred from numerous African mozzy bites. I always wear long skirts out there, but one's feet are exposed in sandals and they have a feast, especially in the evenings.

Speaking of adders, we have quite a few of those in Norfolk, in heathland habitats, and at this time of year they lie rather comatose on paths through the bracken. People tread on them without noticing their presence. But they aren't deadly, and very few bites are reported. No deaths for twenty years. I have no fear of snakes, quite like them actually.