LUCY LETBY CASE TAKES ANOTHER DRAMATIC TURN — NEW EVIDENCE QUESTIONS EMERGE AS MAJOR INQUIRY REPORT NEARS

The Lucy Letby case is heading toward another major moment — and renewed questions about the evidence are putting one of Britain’s most controversial criminal cases back under the microscope.

More than three years after Letby was convicted of murdering seven babies and attempting to murder seven others, her convictions remain in place.

But the legal battle surrounding the former neonatal nurse is far from over.

A review of her convictions is currently underway with the Criminal Cases Review Commission, while the long-awaited Thirlwall Inquiry report is scheduled to be published on September 15, 2026.

The two processes are examining very different questions.

And that distinction could become crucial.

THE CONVICTIONS STILL STAND

Letby was convicted in 2023 of seven murders and six attempted murders.

Following a retrial in 2024, she was convicted of another attempted murder.

She received whole-life sentences and remains in prison.

The CCRC has made clear that its review is not a finding of innocence or guilt. Its role is to determine whether there is a potential miscarriage of justice that should be referred to an appeal court.

So far, no court has overturned Letby’s convictions.

But several areas of the evidence have attracted renewed scrutiny from experts and campaigners.

THE INSULIN EVIDENCE

One of the most closely watched issues involves two babies identified during the trial as Baby F and Baby L.

Prosecutors argued that the babies had been deliberately given insulin, based on laboratory results showing unusual insulin and C-peptide levels.

That evidence played an important role in the prosecution’s case.

Now, however, Letby’s legal team has submitted further expert material challenging aspects of the interpretation.

A 100-page analysis submitted to the CCRC in July 2026 reportedly questioned evidence given by prosecution insulin expert Professor Peter Hindmarsh and raised issues surrounding the interpretation of laboratory results. The report itself has not been publicly released in full.

Separately, peer-reviewed research published in 2026 has explored alternative explanations for elevated insulin measurements in premature babies.

These developments do not mean the court has found the original evidence to be wrong.

They mean the evidence is now part of a continuing post-conviction review.

AIR EMBOLISM ALSO UNDER SCRUTINY

Another major issue concerns the prosecution’s theory that some babies were harmed through air embolism.

During the trial, medical evidence concerning unusual skin discoloration was used to support the prosecution’s interpretation.

But Dr. Shoo Lee, whose earlier research was discussed in connection with the theory, later publicly challenged how his work was characterized.

An international panel of neonatologists convened by Lee in 2025 reported that it found no medical evidence of deliberate harm in the cases it reviewed.

Again, those findings have not overturned Letby’s convictions.

They are instead among the arguments being raised in the continuing debate over whether the medical evidence was interpreted correctly.

THE CCRC IS STILL REVIEWING THE CASE

The CCRC confirmed in February 2026 that its review of Letby’s convictions was underway.

The commission said it had received a preliminary application in February 2025, followed by expert reports, written submissions and defence material over the following months.

The commission emphasized that it makes impartial, evidence-based decisions and does not determine innocence or guilt itself.

That means the next major legal development could come only if the CCRC decides there is a real possibility that one or more convictions would not be upheld.

For now, that decision has not been made.

THEN COMES THE THIRLWALL REPORT

While the CCRC examines the safety of the convictions, the Thirlwall Inquiry has been investigating what happened inside the Countess of Chester Hospital and how concerns surrounding Letby were handled.

The inquiry examined the hospital’s response to the deaths and collapses of babies and the events surrounding Letby’s employment.

Its final report is scheduled for publication in Liverpool on September 15, 2026.

That report cannot itself overturn Letby’s criminal convictions.

But its findings could provide an important picture of how concerns were handled before and during the period covered by the criminal investigation.

QUESTIONS THAT REFUSE TO GO AWAY

For those who believe Letby’s convictions were properly reached, the verdicts remain the most important fact: a jury heard weeks of evidence and found her guilty.

For critics of the prosecution case, however, the emergence of new expert challenges means the evidence deserves another examination.

The CCRC now has to decide whether those arguments cross the legal threshold required for a referral.

And the Thirlwall Inquiry is preparing to publish its own findings about the institutional failures surrounding the case.

Neither process has declared Letby innocent.

Neither has overturned her convictions.

But both have ensured that the Lucy Letby story is not finished.

On September 15, Britain will finally hear the Thirlwall Inquiry’s conclusions.

And as the CCRC continues examining the new evidence, one question remains at the center of the controversy:

Are the convictions as secure as they appeared when the courtroom doors closed?

For now, the answer remains with the courts.