Previously a school for pupils with moderate learning difficulties, Colnbrook was re-designated as a school for pupils with learning difficulties, autism and speech and language impairment in 2012. Pupils join the school at different times throughout their school career. Currently the large majority of pupils are boys. The large majority are of White British background, with a few of Pakistani or Asian British background. A few are from families where English is not the home language. All pupils have a statement of their special educational needs. The school is organised into three planning groups covering Reception to Year 2, Years 3 and 4, and Years 5 and 6. The Rainbow class in planning group 1 provides for younger children with complex autism and communication disorders, which supports their integration and inclusion into the main school. A few are children in the Early Years Foundation Stage. The Jigsaw room provides withdrawal support for older children with social and communication needs as well as their learning difficulty. The proportion of pupils at Colnbrook eligible for the pupil premium, which provides additional government funding for pupils known to be eligible for free school meals, children in local authority care and children from service families, is above the national average. Currently there are very few in local authority care. The school’s outreach service provides advice, support and training to local mainstream schools, including training at the school itself. The school does not use alternative off-site provision. In September 2013, the school achieved Autism accreditation.