I have always quite liked the TEsco ones. Always buy over factor 25/30 antyhing above that doesn't actually give any extra protection and if you look at the back they have a star rating on them 5 stars being the best. My children are slightly darker than me I am pale and freckled and burn if I look out the window on a sunny day and we all use the factor 30 kids Tesco one and apply regularly never had any problems and the price is so reasonable.
I've just got some Ambre Solaire Rapido SPF 50 for ds. It is an aerosol spray and is a much lighter texture than high spf creams usually are making it a bit easier to rub plenty in. I liked it so much I've bought the SPF 30 one for myself. It is half price in Tesco at the moment.