An Australian-born self-styled healer has become the first woman in England to be handed a life sentence on television after being found guilty of murdering her friend, whose headless body was dumped in Devon.

Jemma Mitchell was told she will serve at least 34 years in jail for killing 67-year-old Mee Kuen Chong at her London home in June last year.

Two weeks after the murder, she drove more than 320km to the seaside town of Salcombe in Devon where she left devout Christian Chong’s decapitated and badly decomposed body in woods.

The prosecution claimed 38-year-old Mitchell hatched a plan to murder the vulnerable widow after befriending her through a church group.

When Chong backed out of giving her STG200,000 ($A358,200) to pay for repairs to her rundown home, Mitchell killed her and forged a will to inherit the bulk of her estate – worth more than STG700,000 ($A1.3 million).

The trained osteopath, who boasted online of her award-winning skill in human dissection, had denied having anything to do with Chong’s death – but declined to give evidence at her trial.

Mitchell stood impassively in the dock as she was found guilty of murder while Chong’s family in Malaysia watched the verdict via a video link on Thursday.

On Friday, Judge Richard Marks KC was broadcast handing down his sentence to Mitchell at the Old Bailey.

It is only the second time cameras have been allowed into an English criminal crown court to record a sentencing, and the first in a murder case in which the defendant is a woman.

During the trial, jurors viewed CCTV footage of Mitchell arriving at Chong’s home carrying a large blue suitcase on the morning of June 11 last year.

More than four hours later, she emerged from the property in Wembley, north-west London, with the suitcase appearing bulkier and heavier.

After Chong was reported missing, Mitchell claimed she had gone to visit family friends “somewhere close to the ocean” as she was feeling “depressed”.

In reality, Mitchell had decapitated Chong and stored her remains in the garden of the house she shared with her retired mother in Willesden, northwest London, the prosecution suggested.

On June 26 last year, she stowed the body inside the suitcase in the boot of a hire car and drove to Devon.

Chong’s headless body was found by holidaymakers beside a woodland footpath near the picturesque town of Salcombe the next day.

Following a police search of the area, Chong’s head was recovered a few metres away from the body.

A post-mortem examination found skull fractures which could have been from a blow to the head and broken ribs, said to have been caused by the body being stuffed into the suitcase.

A search of Mitchell’s home uncovered Chong’s fake will and personal papers.

The blue suitcase had been stored on the roof of a neighbour’s shed.

Chong’s DNA was identified on a bloodstained tea towel in a pocket of the suitcase.

Jurors heard that Chong had suffered from schizophrenia and was referred for help after writing letters to the then-Prince of Wales and also the then prime minister, Boris Johnson.

Mitchell had grown up in Australia, where her mother worked for the British Foreign Office and had set up an osteopathy business there before returning to the UK in 2015.

Following her conviction, Detective Chief Inspector Jim Eastwood, who led the investigation, said: “Mitchell has never accepted responsibility for Deborah’s murder so there are questions which remain unanswered.

“Why she kept her body for a fortnight, why she decapitated her, why she deposited her remains in Salcombe.

“What we do know is that these were evil acts carried out by an evil woman and the only motive clearly was one of financial gain.”