Hi Bananaknickers
has she onlyy just started doing this? My daughter is the same but she was only pottytrained (long story)months before she started reception, for a lonf time I thought it was about starting school, but she's now in y1 and we still have the problem, she has also recenl decided she doesn't want to wear nappies at night, and we have to wake her up everynight or she wets herself (sometimes twice a night)...lots of washing in our household!!
Have you tried sending her to the loo ever 2 hours? this is waht I was alwas told to do, to train them. I know EXACTLYY how ou feel, dd1 has been having this problem since august 2006 and I am desperate!!
she's been checked by a pead and phsicallyy there's nothing wrong. Apparently some children are just like this and it takes time for their bladder to learn.
You can have a look at this website
Also mayybe yyou could ask the teacher to gently remind her to got to the toilet at break times, and provide her with some spare knickers to keep in her bag. (this is what I do)
Best of luck, I know how difficult it is, my dd is so stubborn and refuses to go, and I'm worried otehr children will start to notice and make fun of her for this....