It's claimed two leading suncreams don't offer the level of protection on the bottle.
Consumer group Which? has rated two Factor 30 products - one from the Boots Soltan range and one from Hawaiian Tropic - as don't buy, after tests showed them to be only two thirds as effective as they should be.
Boots and Hawaiian Tropic both insist their products comply with regulations.
Rosemary Scott is a Cancer Prevention Officer with the Irish Cancer Society.
She says it might be time that suncreams get a standardised system of regulation:
