A killer convicted of murdering a paedophile in a top security jail in Cambridgeshire has failed to persuade a High Court judge to soften his prison regime.

Michael Cain complained that prison bosses had unfairly refused to downgrade his category A prisoner status.

But Mr Justice Stadlen has refused to declare his grading unfair, after a hearing at the High Court in London.

Cain – who is in his mid 40s – was given a life term in 1987 after being convicted of murdering a shopkeeper during a robbery.

In 1995, Cain was given a second life term after he and another inmate were convicted of murdering child killer Leslie Bailey – who was known as “Catweazle” – at Whitemoor prison near March, Cambridgeshire, in 1993.

His minimum prison term expired in 2010 but parole board officials have not recommended his release.

Mr Justice Stadlen was told that Cain had not accepted responsibility for Bailey’s murder until four years ago.

Cain told a psychologist that he had “held the belief for many years” that Bailey was not a “victim” because of the “nature” of his crimes.

He said he had acted as a “look out” while “his associate” John Brooks went into a cell to beat and strangle Bailey.

Mr Justice Stadlen said he recognised that his conclusion on the grading challenge would be “unwelcome” to Cain.

But the judge said Cain was to be “commended” for his “belated admission of responsibility” for Bailey’s murder and willingness to address his “offending behaviour”.

In recent years Cain has been held at Frankland jail near Durham and Full Sutton jail near York, the judge heard.