I disagree, either under 18s are all treated in the same way (the severity of what they have done will be dealt with in the relative proceedings) or everyone under 18 are all treated as adults for what they do.
For me the principle remains the same, picking and choosing on the basis of who they are or what they have done is not natural justice.
Are we not saying pretty much the same thing now? Begum should answer for things she’s done as an adult, not for running away at 15. Bola can’t be retrospectively punished as a child.
Obviously the severity and potential punishments of bad tweets and running to join IS are miles apart, but if both Bola and Begum were caught when they were still kids, they would and should be punished as kids. If Begum committed crimes as an adult, she should be punished according to her age, any other circumstances like grooming should also be taken into account.