In Parliament and out, Evans was an activist on issues relating to disability. He helped draft the sections on disability in the National Assistance Act 1948, was instrumental in the release of the National Health Service's first hearing aid Medresco, and from 1949 until his death he was chairman of the Ministry of Health Health Advisory Committee on Handicapped Persons. His contributions on deafness were respected on both sides of the House, and nearly a decade after his death he was described as "the spokesman for the deaf in this House".