In the final programme of the series, headmaster Chris Britten is reminded of the impact that Ysgol y Deri, Britain's biggest special school, has had on the life of its pupils.

The reality of life in Britain's biggest special school where anything is possible - extreme sports, defying the odds of medicine and a big Christmas tree.

The reality of life in Britain's biggest special school. Pupils conquer their fears at an outdoor adventure centre in Exmoor, and for many it's their first time away from home without family.