The president of the U.K. learning disability charity Mencap died on Saturday morning (20Aug16), his family has confirmed. He had been terminally ill and recently urged Parliament to change the law on assisted dying.

Known as Brian Rix before he became a member of the House of Lords in 1992, he performed on stage and TV, specialising in a series of post-war political comedies.

He starred alongside comedy greats including Tommy Cooper and Sid James for more than 30 years on British television.

After his eldest daughter was born in 1951 with Down's syndrome, he began campaigning for people with learning disabilities in the U.K.

From 1980 to 1988 he was secretary general of Mencap, becoming chairman in 1988 and then president - a role he occupied until his death - 10 years later.

Paying tribute to Lord Rix, Jan Tregelles, chief executive of Mencap, said: "His unique charm, personality and passion have been invaluable in helping Mencap grow."