The judge found the verdict was "not complete" and ordered a retrial.

BBC: Iran hangs two men for spying for Israel and US

But last year, the Court of Appeal ruled new scientific doubts over the evidence meant the conviction had to be quashed and ordered a retrial.

BBC: George not guilty of Dando murder

The Court of Appeal ordered a retrial and that trial was due to begin when their lawyers asked for the charge to be put to them again.

BBC: Pair given life sentences for Michael McIlveen murder

They were ordered to face a retrial after their appeals against being held liable for the bombing were upheld.

BBC: Omagh bomb scene

He was then ordered to face a retrial.

CNN: Man acquitted in killing of British soldiers

However, a retrial was ordered in January after he appealed against the sentence, with the court citing "procedural failings".

BBC: Egypt's Hosni Mubarak ordered back to prison

The trial was ruled unconstitutional last year and a retrial was ordered.

BBC: NEWS | Americas | Shining Path retrial halted again

Last June, Mr Mubarak was sentenced to life in prison for killings committed during the 2011 uprising that ended his decades-long rule, but in January a retrial was ordered because of procedural failings.

BBC: Egypt: Court gives Hosni Mubarak custody decision

But after a recent appeal hearing in Moscow a retrial on the original charge of treason was ordered.

ECONOMIST: Russia

Recorder Dallas discharged the jury and ordered prosecutors to decide within seven days whether Mahmood should face a retrial.

BBC: EDL bomb hoax message jury fails to reach verdict