The 1930s was a transformative era for British interior design, moving away from the heavy ornamentation of the Victorian and Edwardian periods toward a cleaner, more geometric look known as the "Moderne" style. These 1930s internal doors feature the iconic "one over three" panel configuration a large flat panel at the top with three elongated vertical panels below. This design is synonymous with the suburban "semi-detached" homes of the era and remains one of the most sought-after styles for those seeking a vintage or "Art Deco" feel.