Through the founding of her charity, she cemented this ethos, with the movement for greater aid to be given to those with learning disabilities continuing through the work of Mencap.
Judy grew up in London and went to Minchenden Grammar School before going on to study Economics and Political Science at Ruskin College, Oxford.
However, on the first day, Judy and John were informed that Felicity was not suitable for the school owing to her challenging behaviour and were requested to remove her immediately.
During the 1950s and 1960s, the Association of Parents of Backward Children, led by Judy, advocated the need for support and the potential of people with learning disabilities.
This reversed the previous stance that children with learning disabilities were ineducable, and provided funding for special needs teaching.
Since that point, there have been significant improvements in supporting the lives of those with learning disabilities and as put by Mencap's former chief executive Fred Heddell: "It is possible for an autistic person today to form relationships and to lead a much less isolated life.