June is the middle of the Summer term. All sorts of exciting things will be going on and she won't want to go and miss them. She would also have a lot of lessons to catch up on and possibly miss exams that will stream for Y8 as in our school. It won't be authorised and the school won't be happy with you. I would strongly recommend not doing this. DG
And I would add, if there was 'carte Blanche' to do this, and out of a class of 24, 16 decided to take a couple of weeks in June, can you imagine the disruption? It's only 'ok, no big hassle for the school' because those who DO take school time holidays are having the classroom maintained by the majority of us who DON'T.