Twisted baby killer Lucy Letby smiles on hen do hours before murdering her first tragic victim

BABY killer Lucy Letby grins on a hen weekend — hours before murdering her first tiny victim.

The twisted nurse, 33, has been found guilty of murdering seven babies on her neonatal ward, and the attempted murder of six others.

Letby deliberately injected them with air, force-fed others milk and poisoned two with insulin.

Our exclusive picture shows her with 16 friends in York in June 2015.

The next day she began her year-long spree, striking in the first 90 minutes of her shift at the Countess of Chester Hospital.

She’d agreed to cover it and said in her trial evidence: “It’s awful. I was not even supposed to be working that night.”

The hen party visited several bars in York and ended at Vodka Revolution.

They wore badges and the bride-to-be — a nurse at Letby’s hospital — was draped in a white sash.

Carrying pink balloons, they posed for pictures at the train station and visited Lendal Bridge.

But after returning to work a day later on Monday June 8 2015, Letby murdered her first victim.

Baby A, who weighed 3lbs 12ozs when born 12 weeks early, died from an injection of air 24 hours after his birth.

Letby then tried to murder his twin sister, Baby B 28 hours later.

The girl’s alarm sounded on the neo-natal unit after her breathing equipment had been sabotaged.

Following the tots’ collapses Letby made sinister searches for their parents on Facebook.

Earlier tonight Cheshire Constabulary said it will review the care of 4,000 babies at two hospitals where Letby served from 2012 to 2016.

Only cases which raised medical concerns will be investigated further, police said.

Victims’ parents today said the hospital must share blame for failing to probe claims against Letby.

The Government has ordered an independent inquiry.