A couple of sunscreens to try by an Australian company, Alpha-H (alpha-h.com.au).
One is SPF 30 and waterproof (for up to 4 hours they say) and the other is SPF 15 and tinted, both contain anti-oxidants, are zinc oxide only and are approved by the Australian Cancer Council.
They should arrive in a day or two (ordered from a British store)... wish me luck
They do some pretty interesting looking products too, including some vitamin A, C and E serums. Has anyone else had any experiences with their products?