The criteria for the isolation of prisoners vary by state but typically include not only violent infractions but also violation of prison rules or association with gang members.

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First Minister Alex Salmond told parliament the chief inspector of prisons concluded no prison rules were broken in allowing the video to be recorded.

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Shareholders will have a veto over salaries, golden handshakes will be forbidden, and managers of companies who flout the rules could face prison.

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Citing privacy rules, prison officials would not disclose the nature of Atkins' illness.

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Under current rules, if an MP receives a prison sentence of more than 12 months, they automatically lose their seat.

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But Wendy and other ex-offenders doing this sort of mentoring are being hampered by prison rules, which usually ban them from working inside prisons because they have a criminal record.

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Home Office rules say anyone convicted of an offence which could attract a prison sentence cannot be a candidate.

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The rules at Butner FCC, a medium security prison, do allow for supervised furloughs for funerals of immediate family members, but only for inmates with two years or less left on their prison terms, the New York Post reported.

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