According to government statistics 75,000 men are estimated to be victims of sexual assault or attempted assault each year, with 9,000 men estimated to be victims of rape or attempted rape. However, the same statistics show that fewer than 3,000 offences of male rape or sexual assault were reported to the police in the year the data was collected.

Many Are telling their story to encourage others to do the same:
https://www.bbc.co.uk/bbcthree/article/f78ad097-77d7-4ec0-8014-54ace0fc4b11