This is the case in 2016 where a mother and daughter were murdered in their beds and a teenage girl and boy were found guilty. The names of the killers weren't revealed because of their ages.
The BBC are reporting that the ban on naming the killers has been lifted. The girl killer was the daughter/sister of Elizabeth and Katie. Chilling.
www.bbc.co.uk/news/uk-england-lincolnshire-37907410