Anthony Cedric Graham Hill (23 April 1930 – 13 October 2020), also known as Achill Redo, was an English painter, relief-maker, and mathematician.

He was originally a member of the post-World War II British art movement termed the Constructionist Group whose work was essentially in the international constructivist tradition.

He began painting in the style of Dada and Surrealism in 1948, but quickly moved on to geometric abstract idioms.

He participated in exhibitions of abstract and constructivist art in the UK, Paris, Germany, Holland, Poland, Switzerland and the United States.

The Tate Gallery, London has collections under both of the names Anthony Hill and Achill Redo.