He was a British artist and architect. At the beginning of his career he was a representational painter of landscapes, still life and figures but with time he evolved towards abstract paintings, collages and structures.
Why his work is interesting to me
I was captivated by some of his latest paintings where he used 3D painted rectangles.
Work of art that I find interesting

Abstract in White, Green, Black, Blue, Red, Grey and Pink
1963
http://www.tate.org.uk/art/work/T11978

Relief Construction in White, Black and Maroon
1962-3
http://www.tate.org.uk/art/work/T00609
References: