British businessman Shrien Dewani may be required to give evidence for the first time after a British coroner confirmed it is "working towards a hearing date" over the murder of his wife Anni.
The Bristol care home tycoon was cleared in a South African trial of arranging the honeymoon murder of his new bride after the judge dismissed the case against him.
Dewani has never spoken publicly about his wife' death, with the trial thrown out before he was due to give evidence.
A spokeswoman for North London Coroner's Court said: "The coroner is in contact with the parties working towards a hearing date for this matter."
A formal complaint has been lodged against the judge who presided over the murder trial of British businessman Shrien Dewani in South Africa last year.
The Higher Education Transformation Network - a group of academics and lawyers - accused Judge Jeanette Traverso of "gross judicial bias and misconduct" after she dismissed claims Mr Dewani organised the murder of his wife Anni while on their honeymoon in Cape Town in 2010.
The judge called a halt to the trial in December, two months into the hearing, after an application from the 34-year-old's lawyers that the prosecution case was flawed.
HETN chairman Lucky Thekisho said: "Article five of the Judicial Code of Ethics requires judges to act honourably not only in the discharge of official duties but to act honourably and in a manner befitting judicial office in a professional manner that enhances the public trust in or respect for the judiciary and the judicial system."
Lawyer Mr Thekisho urged South African judicial authorities to suspend Judge Traverso pending an investigation.
Ashok Hindocha, Anni Dewani's uncle, said: "We agree that Anni did not get a fair trial.
"The case was not fully heard, she (judge Traverso) should have let Shrien take the stand."
The home of honeymoon murder suspect Shrien Dewani has been attacked by vandals, days after he was freed by a South African court.
A large amount of white paint was splashed on the tarmac driveway outside the electronic gates of the £1.5 million villa in Bristol. The Dewani family have hired a private security firm, which has put up a sign warning that the property is being guarded and protected 24 hours a day.
The paint appeared overnight after reporters spent all day waiting in vain for the return of the 34-year-old.
He was dramatically cleared of arranging the murder of his wife Anni in 2010 and allowed to return to the UK on Wednesday. Dewani is believed to be staying in London before returning to his home in the Westbury-on-Trym area of Bristol.
The big detached property, which is shielded from the road, is owned by his family, who run a care home empire in the West Country.
Shrien Dewani had always denied plotting to arrange the murder of his wife, who was shot after their taxi was hijacked while the couple were on their honeymoon.
But his wife's family are now threatening a private prosecution against him.
Former murder suspect Shrien Dewani has arrived back in the UK after being cleared of plotting his wife's death on their honeymoon in South Africa four years ago.
He flew into Gatwick early this morning. Media are camped outside his home in Bristol, awaiting his return.
Mr Dewani was extradited to South Africa in April, having suffered from severe post-traumatic stress and depression. His trial began in October.
But earlier this week at the Western Cape High Court, Judge Jeanette Traverso dismissed the case after criticising the quality of the prosecution's case.
Shrien Dewani has arrived back in the UK after being cleared of organising the murder of his wife Anni on their honeymoon in Cape Town in 2010.
The Dewani family flew into Gatwick Airport with airline Emirates and travelled in First Class.
The 34-year-old left the airport through a side entrance which was guarded by armed police before being driven away in a black people carrier shortly before 7am.
Ashok Hindocha tell ITV News his family needs "closure" and will discuss future plans with lawyers in the coming weeks.Read the full story ›
Shrien Dewani is on his way back to the UK after being acquitted of organising the murder of his wife Anni on their honeymoon in 2010.
The Dewani family spent a peaceful final hour in South Africa in an airport lounge.
They were also given the VIP treatment by airline Emirates, who allowed them to board after the other passengers and kept them out of view in First Class.
ITV News' Steve Scott is travelling back from South Africa on the same plane as Mr Dewani.
Former murder suspect Shrien Dewani has left Cape Town after being cleared of plotting his wife's death on their honeymoon four years ago.
Dewani made no comment as he walked through the airport in Cape Town surrounded by a media scrum.
The millionaire businessman faced a barrage of questions from reporters as he headed straight for the boarding gate.
He is due to fly to Gatwick via Dubai and is expected to land in the UK tomorrow morning.
Yesterday Judge Jeanette Traverso cleared Dewani after ruling that the prosecution case - that the bisexual care home boss had arranged the death of his wife Anni - was flawed.
Shrien Dewani is expected to return home to the UK after a South African judge cleared him of arranging the murder of his wife on their honeymoon.
The 34-year-old businessman, who has been in Cape Town since April, has yet to comment publicly on the case since extradition proceedings began, three weeks after Anni Dewani died.
Judge Jeanette Traverso dismissed the case against him yesterday, after evidence from prosecution witnesses was described as being "riddled with contradictions".
The ruling ended a four-year wait for Dewani and his family to clear his name - a battle which has included lengthy spells in mental health units, lurid allegations about his private life and fighting extradition from the UK to face justice.