A HIGH-RISK sex criminal who is wanted in the United Kingdom may be at large in Ireland, British police have warned.

William John Paden, a 56-year-old serial offender, has been prosecuted 19 separate times dating back to 1974 and is being sought by UK authorities.

His convictions include rape, indecent assault on a child and assault with intent to rape. He is thought to pose a significant risk of reoffending.