One of the exhibiting group of artists that contribute to annual exhibitions at Gallery TRESCO on the Isles of Scilly. He paints in acrylics on canvas, and creates land and seascapes of a distinctively impressionist quality.  Some of his titles are Yellow Buoy, Island Light II, Low Tide, Tresco, and Red Buoy II.

Garratt is a tutor at Newlyn School of Art (2016).