William Roberts1895 - 1980
William Roberts has the distinction of being the longest living original Vorticist, and all through his life since the Vorticist Manifesto, considered himself a Vorticist.
He was born 5 June 1895 in London, and studied commercial art. Due to his talent for draughtsmanship, he was given a scholarship to the Slade School, where he attended from 1910 to 1913. He joined the Omega Workshops, though was not involved in the Round Robin Letter.
...Vorticism, in fact, was what I, personally, did and said at a certain period...
Wyndham Lewis, Catalog Introduction, Wyndham Lewis and Vorticism, Te Tate Gallery 1956.
Understandably, Roberts took exception to him trying to make out it was all his own idea; a typically Lewisian utterance. It led to Roberts writing and publishing some pamphlets arguing his case, describing himself as a Vorticist.
He died 20 January 1980.
There is an excellent series articles, including many pictures, at William Roberts Society website.