Natural Suncream

What suncream does everyone use? I'm on the hunt for something natural and hopefully not filled with lots of chemicals if something like that does exists???
In the uk I tried to get a small amount of sun exposure dusting the early or late hours and avoid the sun mid day , but would like something for use on Holidays .
Thanks

India has mega reactions (chemical burns!!) to anything other than Green People. It isn't the highest SPF but it makes very little difference in reality and I'm not likely to fry her in the mid-day sun.