I am in the same situation. The application has just been placed in processing so I understand this to be the manual rather than digital route.
Reviewing the forum this does not seem good news time wise. We travel on 7th July.
Does anyone know if they will issue the child passport as the application was accepted more than 3 weeks before they turned 16?
Does anyone have experience of how you access the upgrade service if we get to the two week prior to travel mark?