Robber's supporters in No 10 march
Supporters of an armed robber jailed in a trial without a jury plan to march to Downing Street to demand his right to appeal.
John Twomey is currently serving a 20-year jail sentence for an armed robbery on a Heathrow warehouse in 2004.
An appeal against his sentence was rejected by the Court of Appeal in January this year, and now supporters say he has been denied the chance to take his case to the Supreme Court.
His trial, along with three other defendants, was heard without a jury after the Court of Appeal ruled there was a serious risk of jury tampering.
There had already been three abortive attempts at holding the trial with a normal jury, lasting up to six months at a time.
Evidence of alleged jury tampering was kept secret because it was deemed too sensitive to make public, but Twomey's legal team argued that a summarised version of that information should have been given to the defence.
On Sunday his wife Caroline and around 150 supporters plan to march to Number 10 to deliver a letter to the Prime Minister.
Mrs Twomey said: "My husband was tried without a jury and sentenced to 20 years, based on secret evidence.
"I am begging David Cameron, for the sake of John and my five kids, to investigate how the first man to have a trial without jury since the time of Oliver Cromwell cannot be allowed to appeal."