Hi Paul
I too find Mosquit - ex the best but there are only certain places that sell it I looked it up on their website and it said in the UK it's only airports and Superdrug that sells it, hence why in May I got the Boots version,I looked up the ingrediants and they were the same, 50 % deet and some others I can't pronounce. I think with Mosquit - ex the more you put it on it builds up a resistance, I put it on the day I fly and a week before stop wearing my beloved perfumes, but that's a very small sacrifice for not getting bitten.
Take Care
Mary