He was born in Oswaldtwistle, Lancashire and trained at the Royal College of Art, studying stained glass.
Many of Grimshaw's talented students went to the Royal College of Art.
Some of his students included actor Frankie Vaughan, performer John Waite, sculptor Geoffrey Clarke, painter Audrey Pilkington and photographer Geoffrey Ireland.
The oil paintings depict abstract landscapes using pointillist techniques.
The gouache paintings depict abstract portraits of faces and dancers.