It was, ruled West Sussex Coroner Michael Hugh Blakeney at the time, a 'tragic accident'.

On Tuesday June 6, 1978, five-year-old Andrea Bernard took herself upstairs at their family home in Thornton Heath, South London , ran herself a hot bath, and got in.

Later, she dried herself, got dressed, and joined her 19-year-old step-mother, Janice Thomas in the garden.

But something did not feel right. She told Janice: 'Mummy, my legs are itching'. Then she fainted.

Janice removed the little girl's dress and noticed her legs were bright pink, and the skin was peeling.

They rushed Andrea to the hospital where she was treated for 'severe' burn injuries to at least 50% of her body.

Five weeks later, Andrea died from her injuries in excruciating pain. The inquest, held just eight days after, absolved Janice of any blame, given the accidental nature of what happened.

Except that it was all a lie. Andrea was killed. And only now, nearly half a century later, has the truth finally emerged about what really happened on that awful afternoon in south London.

On Sunday, September 11, 2022, Desmond Bernard walked into Croydon Police station and asked to speak to an officer. He said he had information about his little sister's death more than 40 years earlier.

Back in 1978, Desmond, who was just eight years old, had backed up his stepmother's version of events - he had been outside with Janice, and Andrea had been in the bathroom alone. But what he was to tell police now, detectives would later admit, was 'chilling'.

Janice, he said, was regularly violent to the children. She would beat them, hit them with belts, once stubbed a cigarette out on Desmond's body, and forced him to eat cat food.

These, he said, were 'punishments', meted out on the children to discipline them or as chastisement for what their new stepmother had deemed poor behaviour.

She also subjected them to extremely cold baths. And, on that fateful day in June, ran one far too hot for Andrea's sensitive young skin.

Desmond told police he knew this, because rather than being outside, he was actually in his bedroom next door to the bathroom, and heard his little sister screaming: 'Mummy, it's hot, it's hot.'

But this account was kept quiet at the time, because Janice had promised Desmond she would no longer beat him if he stuck rigidly to her story that Andrea was in the bathroom alone.

And keep quiet Desmond did. Right up until, in 2021, Janice released her memoirs, and proved an unwitting trigger in finally securing justice for Andrea.

Andrea Bernard lived an unremarkable, if slightly chaotic, childhood. She adored her older brother, Desmond, and their father, Desmond Bernard senior, a chauffeur in for the Trinidadian High Commission in central London.

Their mother, Angela, was briefly jailed for theft in October 1975, and upon her release, her husband had moved on romantically.

His new girlfriend was Janice Thomas, a teenager who had fled her family home in Leicester and pick-pocketed her way around London ever since.

She met Desmond - known as Bernard - on a night out, and he invited her to move in with him. The children were staying at a family friend's house, but soon came to live with them.

Accounts of what happened next vary. Janice said she never struck the children, and would only shout at them, or tell their father they had misbehaved.

Yet Desmond described in detail how, from day one, Janice punished the children for being 'cheeky' and not showing enough respect to the newly installed matriarch.

'She started beating us, just hitting us, for the most part,' Desmond would recall, half a century later.

'It was harder than I ever felt… I had been slapped before by my mother, this was much harder. She told us she was not going to stand for that and there was nothing we could do, and if we were to tell our dad, we could get it worse.'

Indeed, things got much worse. One day, the punishment went too far.

The children came home from school and Janice was seething with Andrea, supposedly for failing to clean the house properly while being kept home from school, and then escaping by running down the road to join her brother for afternoon lessons.

'As soon as we got through that door, Janice started shouting, beating Andrea… she was furious,' Desmond recalled.

He said he went up to his room opposite the bathroom where he heard his sister's haunting pleas for mercy.

Desmond said: 'I could hear her (Janice) shouting and slapping, and Andrea, of course, screaming and crying.

'Next thing I remember is the bath was running… I could hear footsteps back and forth.

'I could hear shouting from the bathroom. I could hear Janice shouting: 'Get in the bath.'

'And I could hear Andrea saying: 'The bath is too hot, mummy.'

He said this lasted a 'couple of minutes', after which he said: 'Then I heard the screaming stopping. I could hear Janice telling Andrea to wake up.'

The police briefly investigated on behalf of the coroner, but, having shown what appears to be only a cursory interest in the death of a young, black girl, accepted what Janice - and Desmond - had to say about it.

'She asked me to say it was an accident,' Desmond would later say in court.

'To say that we were in the garden when it happened, and that she would never beat me again.

'I lied, I told everyone that story.'

Indeed police officers, friends, hospital staff and Andrea's biological parents were all told Janice was in the garden when Andrea took a bath alone.

Asked years later why he covered for his tormentor-in-chief, Desmond said: 'I didn't feel protected, I just wanted it to stop, and that was the only way I thought I could stop it.'

The beatings stopped. Desmond was safe.

But the anguished memory of what happened had already taken root.

By the early 1980s, Janice and Desmond had split up and she was no longer 'mummy' to Desmond in the way she had been before. Instead, she was 'Mama J' to drug dealers and users across south London.

The former street thief had built up a lucrative business model selling premium quality cocaine, during sociable hours. She was apparently inspired by then-Prime Minister Margaret Thatcher to grow her business.

Its success allowed her to wear designer clothes, eat at fancy restaurants, shell out thousands on the latest technology - including being among the early adopters of a mobile phone - and drove a Jeep customised with the words 'nasty girl'.

She would carry a gun on occasion and was not afraid to square up to a rival muscling in on her patch.

Nix, as she is now known, was a mother to biological daughter Nadia by the time she was handed a nine-year jail term in 1992 for drugs offences.

Knowing the police were on to her, she coached the primary schoolgirl to lie about mummy's whereabouts if she was ever to be questioned by police.

A further eight-year jail term was to follow in 2002 over her role in a major cannabis deal, despite a promise to Nadia - living with her father in the US at this point - that she would stop.

It is during this stint inside that Nix's supposed redemption began.

Her 2021 memoir Breaking Out, published by Harper Collins, allowed Nix to carefully shape the narrative of her past.

Over nearly 350 pages, she described her difficult childhood in which she said she ran away after being abused, only to find herself homeless, penniless and at the mercy of petty criminals.

She spoke about using her skills as a reformed character to steer young criminals towards a law-abiding existence outside of the prison system, peppering her tome with anecdotes of her supposed heroics.

It was perhaps no surprise that the memoir irked Desmond. He would say: 'I was so distressed by the things she said, I could not stop thinking of Andrea and all the abuse we had suffered.'

After confiding in a therapist, and then his family, he summoned the extraordinary courage to contact police.

Nix was interviewed under caution soon after, offering a prepared statement through her solicitor outlining that Desmond was wrong. She floated an idea that he was motivated by a grievance over an inheritance, even though Nix herself was not the beneficiary.

And then the trial went quiet. Police were frustrated at every turn, witnesses now long gone and only a 16-page coroner's report providing an insight into what happened.

Nearly two-and-a-half years later, Nix was approached by police as she landed at Heathrow airport on a flight from Antigua.

Bodycam footage showed the moment Nix's jaw dropped as she was told she was being arrested on suspicion of the manslaughter of Andrea, and child cruelty to Desmond, dating back to 1975.

Nix appeared at the magistrates court within a couple of days and was released on bail. She maintained her innocence.

And in May 2026, Nix arrived for the first day of her three-week trial at Isleworth Crown Court, denying she had done anything to the children.

She claimed an elderly neighbour - who had long since died - would be able to corroborate her alibi. She failed to mention his existence prior to 2025.

She gave evidence over two days, speaking calmly and softly to deny allegations that she had been violent to the children.

Officers later noted how her appearance before jurors was vastly different to how she presented at the police station.

That composure deserted her when the jury found her guilty of both counts. She initially shook her head at the guilty verdicts, then began sobbing loudly.

She was still wailing as she was taken into custody after the jury and the judge left the court room. Family members supporting her in court barely reacted before themselves filing out.

In a statement outside court, Desmond described Janice's behaviour as 'degrading and sadistic'.

But he said the verdict brought 'a sense of justice and accountability for the incredibly horrific and tragic events of 48 years ago'.

He concluded: 'When I saw Janice in court, I saw a pathetic human being acting as if she is the victim.

'A person who shows no remorse for the loss and pain inflicted on other people.

'She only seemed to be sad for herself.'

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