Seago’s best known subject is arguably that of his birthplace, East Anglia. Housebound for much of his childhood due to illness, Seago learned to embrace the rural views that surrounded him from a young age, developing a passion for nature which lasted the rest of his life. After returning from the frontlines of Italy in 1945, Seago began painting primarily Norfolk and Suffolk vistas, concentrating, as Constable had, on the places he knew best. Fields, hamlets, windmills and waterways were captured across all seasons with a richness and romantic quality of light and colour. Seago masterfully conveys the splendour and character of place in every landscape.

While his inspiration stems from traditionalist painting, Seago’s astute brushwork and palette indicates a freshness and modernism to his work: from vast, expressive skylines to a small flash of white of a distant sailboat catching the sun. The estuaries and waterways of Pin Mill and the Orwell also allowed Seago to explore the landscape in greater depth, as he often rented a boat to view East Anglia from new perspectives. The merchant ships and barges travelling through these areas also became a significant part of his practice and Seago can be seen to paint these vessels with a grandeur and beauty, highlighting his affinity for sailing as well as their historic significance on British society.