The BBC has reported that a man who has been subjected to claims he is the killer of James Bulger, has asked for the UK government to reveal who the real murderer is.

After receiving negative postings and threats through his Facebook page, David Calvert, 27, has asked the Ministry of Justice to reveal the identity of Jon Venables.

Venables, also 27, was released on licence in 2001, having been convicted, with co-accused Robert Thompson, of two-year-old James's murder in 1993.

Venables and Thompson were only ten when they snatched James Bulger from his mother in a shopping mall.

Both killers now have new, secret identities, although Venables has recently been in the news, charged with an unknown crime, but thought to be linked to child pornography.

Claims that Mr Calvert was Venables first emerged when he lived in Fleetwood, Lancashire, in 2005, when he informed neighbours he had been in jail for fraud.

The father-of-four has since become the subject of rumours and has been named on the Facebook social networking site as Venables.

Mr Calvert told the BBC he had become worried about the accusations and wanted to stop looking over his shoulder.

He said: "I'm more concerned about the safety of my children. I want Jack Straw to actually tell who this monster of a man is. Venables is not a child anymore."

He asked for Jack Straw to put out a statement to say that Jon Venables is not David Calvert.

Mr Straw has so far refused to give details of the current Venables case, only confirming that he faces "extremely serious allegations."

He told a Committee of MPs on Wednesday that orders preventing the identities of Thompson and Venables must remain in place to prevent lynch mob attacks.