A significant ecological event has occurred at Furnace Brook, a privately owned fishing lake in the High Weald area of East Sussex. The owners, Alistair and Diane Gould, reported that the lake's entire fish population died overnight, an event they described as sudden and devastating. According to the owners, the distress was visible in the wildlife, with eels observed climbing out of the water shortly before they died.

Furnace Brook has served as a popular destination for local anglers for years, with the owners noting that some visitors had developed long-standing connections to the site and its aquatic life. The lake, which is fed by a stream and situated in a secluded valley, was previously considered an idyllic environment. While the owners have expressed deep concern over the loss, the specific cause of the mass mortality event remains under investigation. The sudden nature of the die-off has raised questions regarding water quality and potential environmental stressors within the stream-fed system, though no definitive cause has been publicly confirmed by environmental authorities at this time.