All good advice Darkwood, but at the end of the day, he's an apprentice and wouldn't know too much about the sort of panelwork you're involved in. He get's given the materials and instructions on how to markup/identify the cables. What you can see, as soon as the cover of this JB arrangement is removed, is that a bit of care and thought has gone into it's installation...
Personally i don't like to see cable ties to dress cables, certainly not in a consumer unit or distribution board setting, but in a JB as we have here, i don't see much of a muchness of them being used or not.