We have known for some time that the number of convictions for rape and sexual assault are only the tip of the iceberg. Now, thanks to a survey of more than 15,000 women and men across Britain, we have a clearer idea of the true scale of the problem. In Britain one woman in 10 and one man in 70 have experienced sex against their will since they turned 13. More than half of them have never told a soul.

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