Diana Hoyle was born in Cornwall, where she lived for most of her life. She was an established oil painter known for her Cornish landscapes. An early desire to study art was thwarted, but in her forties she was able at last to become a student at Redruth School of Art. Her work often depicted her life, and her family cherish the paintings they have inherited, which include scenes of Tehidy Woods, where she grew up.

Her landscapes appeared on the West End stage set of a 1990s production of 'The Sound of Music'.

Her work is listed as part of the permanent collection of art in St Michael's Hospital (SMH) at Hayle.