Wow - thanks very much for all the info everyone. I took a quick look at the Shoo website and looks interesting, although I have to say it's the first time I've heard of it.

The only problem is that I have such an extreme reaction that I'm reluctant to try anything different. I currently use a product called Autan that you roll on your skin but if whiffs a bit but seems to work reasonably well. Maybe I could get BF do to a test for me. He gets bitten, but no where near as much as me and barely reacts. Perhaps he's act as guinea pig for me