The subject matter for his work is derived from his interest in English and Mediterranean landscapes, particularly Cornish fishing villages and small towns in France and Spain. He focuses on the vibrant colours of fishing boats and painted houses which serve as a contrast with the natural tones of the surrounding landscapes.

Hart is now based in London and in addition to his flourishing career as an artist, he undertakes freelance commissions for textile designs in the furnishing and fashion industries as well as lecturing at art colleges throughout England.