Hi bookend:
Had this case been head at Juvenile Court there would have been reporting restrictions but, although it is possible that they could be imposed, there is no guarantee that this will be the case at Crown Court.
It would of course be at the Judge's discretion but it would be unusual indeed should s/he allow details of Juveniles on trial to be published. That would also include photographs of them.
In exceptional circumstances it has been known for Juvenile defendants to give evidence by live video link. But this is rare.
It is also worth bearing in mind that the Court could require a Juvenile of under 18 to be accompanied by a parent or guardian.
I would strongly recommend the parents/guardians to contact whoever is legally representing both Juveniles for further advice.
Hope this is of help.