Sir David says the former nurse's conviction was "built on a poor understanding of probabilities" and lacked "hard evidence".

A Sark resident is attending the House of Commons today in support of a UK MP speaking on the role of expert witnesses and the trial of Lucy Letby.

Sir David compared Letby's case to the overturned conviction of Sally Clark who was cleared of murdering her sons in 2003 Former Conservative cabinet minister Sir David Davis has called for a retrial of convicted baby serial killer nurse Lucy Letby.

Lucy Letby should face a retrial, Sir David Davis has told Parliament, as he claimed the NHS was “most likely” responsible for baby deaths at her hospital.

Sir David Davis said there was no ‘hard evidence’ implicating Letby and the case against her was ‘built on a poor understanding of probabilities’.