Nichol, whose legal practice is based in north London, specialises in miscarriages of justice.
But the Ministry of Justice rejected his application for compensation for a miscarriage of justice in August 2014 on the grounds that the phone evidence had been partly, if not wholly, attributable to Hallam.
Delays highlighted by the campaigners include decisions about Foreign Office documents on the number of civilian deaths in Iraq after the 2003 invasion, and compensation payments to miscarriage of justice victims.
The Ministry of Justice, which has since taken over responsibility for compensation for miscarriages of justice from the Home Office, said it was considering whether to appeal to the House of Lords.
He was chairman of the takeover panel, and also the home secretary's independent assessor on compensation for miscarriages of justice, awarding nearly £1m to Paddy Hill of the Birmingham Six and £30,000 to Colin Wallace, wrongly convicted of killing his friend in a long-running cause célèbre in which Wallace was championed by Paul Foot.
'How can I prove my innocence when the criminal justice system does not provide for proof of innocence?" Sion Jenkins is responding to the pronouncement last week by the Ministry of Justice that compensation awards for miscarriages of justice will only be paid in cases where there is "clear proof of innocence".
On a more promising note, however, and perhaps not altogether intentionally, the savings in compensation to victims of miscarriages of justice will be put back into the pot of the criminal injuries compensation scheme.
About 1 in 500 normal pregnancies result in miscarriages because of amniocentesis.
According to his solicitors, Mr Raissi wrote to Mr Straw in 2004 asking for compensation as a victim of a miscarriage of justice.
