A baby born at the hospital where Lucy Letby worked died months after she was taken off the ward, according to new claims.

Following a number of suspicious deaths and collapses of newborns at the Countess of Chester Hospital where she worked, Letby was suspended from her job as a neonatal nurse and moved into an administrative role.

Six months later, Annalise McClements’s son, Archie McClements, was born at the hospital.

However, he contracted enterovirus and collapsed before being transferred to a unit in Manchester, where he died in December 2016.

Ms McClements said she was told at first that Archie had likely caught the illness – which spreads through contact with mucus, saliva, fecal matter or contaminated water – from her during labour.

But she said she later learned the neonatal unit at Countess of Chester had reported sewage and plumbing problems.

She told The Sun: ‘They said it was me – but they knew full well Archie could have caught it from the unit.’

She added: ‘It didn’t feel [like it had] the cleanliness that you’d expect from a hospital. The unit was quite well-known to have sewage coming up from the taps.’

She also claimed that the ward seemed understaffed.

‘Even if he didn’t die at Chester because they very quickly moved him out, he collapsed there,’ she said.

Letby was convicted of the murder of seven babies and the attempted murder of seven others at the Countess of Chester Hospital between 2015 and 2016.

She was handed 15 whole-life prison sentences and is currently jailed at HMP Bronzefield.

In her trial, prosecutors claimed suspicious deaths and collapses had stopped after she was taken off the ward, a key piece of evidence in her trial.

The Criminal Cases Review Commission (CCRC) is currently deciding whether Letby’s case should be heard at the Court of Appeal.

Ms McClements questioned whether other babies may have been moved out of the hospital before they died.

It is unclear how Archie contracted enterovirus, and whether potentially unsanitary hospital conditions may have been responsible.

But a public inquiry last week found that three of the babies who died could have been saved if consultants and hospital managers had acted sooner.

The Thirlwall Inquiry found seven other non-fatal attacks had been made possible by ‘repeated mistakes and failings by organisations and individuals’.

A spokesperson at the Countess of Chester Hospital NHS Foundation Trust told The Sun: ‘We understand the significant public interest in these matters and recognise the importance of providing reassurance to our patients and the local communities we serve.

‘However, it is equally as vital that we continue to recognise and co-operate with the ongoing legal processes and we are unable to comment on issues that remain subject to an ongoing investigation by Cheshire Police.

‘When it is appropriate to do so, we will provide further information about the actions we have taken to strengthen patient safety and governance and about any further actions we take or have taken to address the Thirlwall report’s findings and recommendations.’

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