A 15-year-old girl and her boyfriend who murdered her Edinburgh-born dinner lady mother and sister have been named.

Kim Edwards and her boyfriend Lucas Markham were 14 when they attacked Elizabeth Edwards, 49, and 13-year-old daughter Katie.

They were stabbed with a kitchen knife in the neck while they slept in their home in Spalding, Lincolnshire, in April 2016.

The couple could not previously be named because of their age but the restrictions were lifted by three judges at London's Court of Appeal.

The ban on naming the pair was lifted by Sir Brian Leveson, Mr Justice Blake and Mr Justice Lewis.

Detective Superintendent Martin Holvey, of Lincolnshire Police, said in a statement after the Court of Appeal's ruling: "The judges have ruled that there is a strong public interest in the full facts of this exceptional case being known, meaning that Lucas Markham and Kim Edwards can now be named.

"The murders of Elizabeth and Katie Edwards were horrific and brutal and the whole country shared a sense of shock that two juveniles, who were only 14 years old at the time, could have carried out such a horrendous act.

"I'm sure that sense of disbelief and horror will be deepened now it is known that it was Elizabeth's own daughter who was responsible for plotting with her boyfriend to carry out the murders."

He added: "Evidence heard in court that was previously restricted can now be reported.

"These include details about the behaviour and actions of Kim Edwards and Lucas Markham afterwards, which was chilling.

"They remained downstairs in the house, watching TV and eating food, whilst the bodies were upstairs. They showed no remorse at all when they were eventually found by officers and during their police interviews."

The pair were both given 20-year sentences but a judge reduced them to 17 and a half years minimum.

The couple had sex, shared a bath and watched Twilight after they had murdered Edwards' mother and sister.

They were discovered and arrested at the home Edwards shared with her mother and sister 36 hours later, having been reported missing to police.