EXCLUSIVE: Hospital bosses used Lucy Letby (left) in a picture (right, inset) to celebrate raising money for a new neonatal unit hours after she murdered a baby boy and tried to kill his twin brother, MailOnline can reveal. Letby, who is Britain's most prolific child killer, is facing a lifetime in prison for murdering seven babies and trying to kill six more. In a final insult to her victims' families, she refused to appear in court today to hear how she ruined their lives. Now, a chilling image has been uncovered of Letby celebrating with four colleagues on August 6, 2015, after fundraising for a new baby unit at the Countess of Chester Hospital - where she committed her heinous crimes - passed the £1.5million mark. Letby is seen flashing a huge grin at the camera knowing full well she had just murdered a baby and attempted to kill his twin