Manhunts are under way after two men were mistakenly released from Wandsworth prison in London in the past week. The first, released last Wednesday, is Brahim Kaddour-Cherif, a 24-year-old Algerian man and a sex offender. The second is William Smith, who had been jailed for fraud on Monday, the same day he was subsequently released in error. It comes after the accidental release of Hadush Kebatu, a migrant sex offender, last month due to what was described as "human error" at HMP Chelmsford.