I had a horrendous reaction to a sunscreen once (it was a Boots No.7). It was so bad I had to see a dermatologist, and it was my entire body, as I had put the sunscreen all over. It took about a month to recover.
Since then I've patch tested a few sunscreens and had the reaction, including sunscreens that were marked 'sensitive' (Soltan sensitive e.g.) the reaction only happens when the skin is exposed to the sun, I think it's something to do with the way chemical sunscreens change the surface of the skin.
I was happily using Simple Suncare but they've gone and discontinued it.
Does anyone have any recommendations? I want high UVA protection in particular.