The SEND Code of Practice 2015 says that mainstream schools must ensure that children and young people with SEN engage in the activities of the school alongside pupils who do not have SEN. (6.2)
Part 6 of the Equality Act 2010 sets out the duties for education settings to make ‘reasonable adjustments’ for children and young people with disabilities.
Schools must provide detailed information about their arrangements for the admission of disabled pupils to the school and publish an ‘Accessibility plan’ explaining adjustments they can make and ongoing plans to improve access.
They must also publish a SEN information report explaining how they identify and support children with Special Educational Needs & Disability
If you cannot find these on a school’s website, you can contact them and ask for a copy.