He is particularly interested in the local landscape, and how both humans and the forces of nature continually reshape the East Sussex coastline. In 2023 he undertook a project in which he painted pictures of the sunken forest at Pett Level, and also wrote a feature about it for The Guardian, including the latest scientific evidence on the ancient trees and the processes revealing them thousands of years later. He is former environment correspondent at The Independent. 

He has previously painted and exhibited artwork in Hastings, St Leonards, the Wye Valley, the Forest of Dean and Brighton.

Harry paints using high quality oil paint on linen, applied with brush and/or palette knife. Paintings start as pencil drawings, then usually a charcoal sketch as a next stage. Chalk and/or charcoal are used for underdrawings on the canvas before paint is applied.