In temperament the Sussex is even-tempered, friendly and calm, deliberate rather than quick, and more vocal than most spaniels. At home it is generally affectionate and easy-going, though its instinct to follow a scent stays strong.
It is long and low, with a massive, rectangular body, short legs and a broad head whose heavy brow gives a frowning look. It moves with a distinctive rolling gait. The abundant, flat coat is a rich golden liver, with feathering on the ears, chest and legs.
The Sussex Spaniel came through its repeated brushes with disappearance thanks largely to a few committed breeders. During the Second World War, Joy Freer of the Fourclovers kennel is credited with keeping a handful of dogs going when breeding had almost stopped. Most modern Sussex Spaniels are said to trace back to her stock. The breed remains scarce and is listed by the Kennel Club as a vulnerable native breed. It was bred to work steadily through thick undergrowth at a pace that suited a shooter on foot, flushing game within range and giving voice as it went so that its handlers could follow it out of sight.