Hi this happened with my GHDs about a year ago and i went to B&Q and got the highest heat resistent glue available, glued tham back on and yes it worked. One of the plates is now loosening again so i will prob just do the same again :)
Also... if ever your GHDS stop working, go on ebay, buy a £5.99 new wire and pluug and you can watch videos on youtube for how to easily replace your wwire. I did this also, and my GHDs are back to working normally!!
Eliza x, February 2009