I think the piano time at school is a brilliant idea. At one point, my daughter received dedicated time in the art classroom. Art is her muse and helps calm her. The other thing that she found calming was dedicated reading time. She was ahead of her peers academically, but would struggle emotionally and behaviorally as the day wore on, which then got her sent out of class. So giving her set times out the classroom actually helped her get through the day, thus helping her succeed.

Does the UK have special laws protecting students with disabilities? Here in the US, our kids are protected by special education disability laws and we have meetings to set up special accommodations such as these.