Who served as junior minister being known for his colorful ties and waistcoasts under the oldest living Prime Minister of the United Kingdom? 
Eric Forth: Eric Forth (9 September 1944 – 17 May 2006) was a British politician. Eric Forth:  In his obituaries, he was described as "colourful", "flamboyant", "provocative" and a "right-wing libertarian". John Major:  Since Margaret Thatcher's death in 2013, he is the oldest living former Prime Minister.
i don't know