OK, on computer now.
Well this morning I took DD2 to school and as soon as she got there she burst into tears. She'd remembered that her teacher had told her to bring in something that reminds her of her as a baby, and she should have brought Ellie (the elephant comforter snuggle that she's only become fond of in the last 3 months, but we tried to give her as a baby
)
So she was wailing (literally) that she hadn't done the homework and basically went into a flat spin. A TA saw her from the adjacent classroom and mouthed at me 'ohhh she's crying
' I, trying to keep myself together, simply nodded. She came to the door, took DD2 inside for a couple of minutes, then DD2 came out. She was still crying. Then she started to cling to the back of my coat, so that as I tried to turn to see her, she also turned behind me.
The class teacher opened the door for the morning and I discreetly said 'Mrs X, could you peel DD2 off me, please?'. She said of course, and said to DD2 as she did, 'I believe Mrs R has already spoken to you about this this morning, DD2. You'll just have to talk about your toy instead.'
Once DD2 was inside, I spoke to her and said 'I can bring in Ellie if that would help, or perhaps you'd rather she learned the consequence of forgetting your instructions.' She said that she'd been telling them about it for 2 days, she'd told them she wouldn't be sending a note home and she specifically wanted them to remember to pass on the message to their parents. Then she asked 'if I was ok'. I just said 'another day, another dollar.'
Later, I went to help at the school and Mrs X saw me. She said that actually, she had been meaning to speak to me. She says that DD2 is much more settled. She's working independently and not asking for help as she used to. She's still sucking her hand, but it isn't getting in the way as it was.
I shared my view that I feel Dragonflies is the cause and I worry for the time that it stops. She says, au contraire, that she feels DD2 just 'needed to get to know her and her ways.' I mentioned that she panicked about her cover teacher at first, because she didn't know her. I pointed out that she did this last year, she's done it this year, and I'm certain she'll do it the year after. 1/2 a year to get 'comfortable' in a class is a waste of half of her school life!
It seemed to prompt a flash of inspiration from Mrs X. She said that the previous year she had a very anxious child and they did an extended transition with early visits to the new classroom/new teacher and pictures, etc. She's suggested it could be done with DD2.
So that's the latest. Thanks for asking 
I'm still befuddled. DD2 wanted to show Nanny and Grandad her yoyoing today. She couldn't get the string on her finger, and wouldn't bring it to me because then Nanny and Grandad would see the yoyo. I said 'Just put it in your arms and bring it to me.'
She said 'I haven't got 3 arms to hide the yoyo and the string!!'
So I said 'well just come in anyway.'
She said 'I can't performance them with them knowing it.'
I just don't hear other children talking like that.
Also, SENCO was taking the class at the end of the day. DD2 walked out of the class with her coat on properly. As we rounded the corner, she stripped it off, and put it around her like a cape again.