And taking your DD away from her few friends seems crazy. Re-entering an established year group will be very hard and isolating.
Yes, this is the thing that is worrying me most. But it is worth understanding where her few friends come from. DD switched schools about a month into Year 5. Again, suddenly, very, very unhappy, and the best I could work out about it was that it was a small community school, and there had been quite a bit of attrition - so that there were by then only six other girls in DDs class, and they had pretty much paired, so that when they had to work in pairs, DD had to work with a boy. And after years of not really noticing what was going on socially, DD had suddenly woken up and reached the stage of development where she noticed that there was nobody to play with in the playground.
And then I was chatting to a friend who just happened to have taken a new job as the administrator of a neighbouring school. And she, in passing, said to me, "it is really odd, we have a very long waiting list at every year level, except in Year 5, we have these two open places that haven't been filled since two families left in May". And I said to her "I think we might be interested in one of those places". I had a discussion with DD, and the following Monday we went to see the school (I took DD in late to her other school). I asked DD as I dropped her back whether this was what she wanted, and she gave me an emphatic yes. So I went straight back home and filled in the LEA form, then ran around filling in the faith requirements form, which I dropped into the school Tuesday morning. By Tuesday afternoon we had our place, and she started at the school the following Monday.
But I had my heart in my mouth, because who changes their kid at Year 5? But it was a terrific success. If I had been concerned about academics, I might well have said that the new school really didn't push her, but she spent the Year 5 year sociallising and making friends with a couple of other summer babies who were drifting a bit, and by the end of it, they were a close threesome. At Year 6 there were various incidents where eg she didn't finish the practice SATs papers in the time allocated, so she was sent to the library to finish, which she hated, but other than that, she was mostly allowed to cruise, doing averagely well and under the radar, and even if she didn't finish the actual SATs paper (which she told me she didn't), she got the expected level in maths, so nobody fussed.
And one of a range of reasons for going to this high school was because that is where her two best friends were going. But best friend number one is in Set 1 for the subjects she is in Set 2 in, and in Set 2 for the subjects she is in Set 1 in, and best friend number two is in Set 3. And the school isn't very happy about her cruising in Set 2 due to her not finishing papers, when she is capable of more. And a fourth girl has joined up with the group, who is also in Set 3, so best friend number two and this new girl are spending more and more time together, and it is becoming more like two pairs.
Oh, it is also worth noting that she goes to an art therapy group run by one of the charities for siblings of life limited children, and she has become friendly with a set of twins in that group, who I understand from DD are in fact out of year, and should be in DD's year, and who are going to be in her school next year. And we also have family friends who have one girl in DDs year, and a set of twins (boy and girl) who are actually closer to DDs age, but in the year below, and in the old days, when we went there, DD would play with the twins more than the older girl. Now she does interact with the older girl, as they see one another at school, but still seems closer to the twins, both of whom will be in DDs school next year.
So there are already potential friends in the year below - and maybe even more than in her current year. It is mostly best friend number one I am concerned about.
Oh, and DD decided this year she wanted to learn martial arts, and speaking to the sensei, we decided to put her into the younger group, which was supposed to be for primary school, rather than the high school group. So she did that this year, and has enjoyed it very much, and just last week had a trial in the older group, with the other Year 6s going up to Year 7, and that worked very well.
So every time she has a chance, she seems to gravitate towards girls from the year below - except for best friend number one - who is born at the end of August, and is an extreme summer baby. But yes, I am very worried about breaking her up with best friend number one.