DS (7.10, undiagnosed but suspected ASD/ADHD) only used a school toilet for the first time in his while school career yesterday. His 1:1 came out when I picked him up at lunchtime (he's on half days atm, long story) with the biggest smile to tell me and I almost cried 
Toilets are one of DS biggest issues but yesterday when washing blue paint off himself (he was still basically covered in it when I picked him up ) he suddenly rushed into the cubicle for a wee.
If anyone else has any such small footstep/giant leap moments I promise to roundly congratulate all concerned and share your joy!