The spokesman said that the Crown Office had published the findings of a "landmark review" of the investigation and prosecution of sexual offences, which he said would give victims "increased confidence" in quality of investigation and prosecution.

BBC: NEWS | UK | Scotland | Shock over 'rape blame' findings

The first prosecution under section S72 of the Sexual Offences Act of 2003 involved Barry McCloud, who was jailed for life in 2010 for sex offences against a girl in Goa.

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The Crown Prosecution Service said the offences committed carried maximum sentences of 10 years, but the four-year sentences were the lengthiest related to rioting so far.

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The prosecution had alleged he had been fraudulently claiming money since 2002 but the jury only convicted him of offences from 2004 onwards.

BBC: Robert Henry Jolleys

Gwent Police hosted a conference last week to raise awareness of disability hate crime, and the Crown Prosecution Service has established independent scrutiny panels to review case files on offences against disabled people.

BBC: Disability hate crimes 'unseen'