Under the Equality Act 2010, disabled children have the right not to be discriminated against. Schools also have a duty to take reasonable steps to avoid disadvantage for these children.
if you feel that your disabled child has suffered discrimination, you can complain to the governors of the school. If you are not satisfied, you can then make a disability discrimination claim to the First-Tier Tribunal (Special Educational Needs and Disability).
Please follow the links in the right hand column for more information.