Painter in oil, watercolour and gouache, especially of flowers and landscapes. Born in Oxford, she attended the Byam Shaw School of Art, then studied art in Paris, Lugano, India and the Hebrides. Participated in extensive mixed exhibitions throughout her life, initially as Winifred Roberts, her maiden name. She married the painter Ben Nicholson in 1920 and had her first solo exhibition at the Mayor Gallery as Winifred Nicholson in 1925. She was a member of the 7 & 5 Society 1925-35 and the NEAC 1937-43. She was also the mother of the painter Kate Nicholson. Nicholson contributed to Circle, International Survey of Constructive Arte, in 1937, designed a 'constructive' fabric for Alastair Morton's Edinburgh Weavers the same year, as Winifred Dacre, and under the same name showed four abstract works in an Exhibition of Constructive Art at the London Gallery. Until late in life she travelled widely, exhibiting in Morocco, Greece, Cornwall and Cumbria. Her later work was concerned with prismatic colour experiments. She exhibited internationally, and her work is held by many public galleries including the Tate Gallery, Bristol, Bradford, Adelaide and Melbourne. A major exhibition of her work toured from the Tate in 1987-8.