Gusbourne PLC, together with its subsidiaries, produces, distributes, and sells English sparkling and still wines under the Gusbourne brand in the United Kingdom, the United States, and internationally. Gusbourne PLC was formerly known as Shellproof Plc and changed its name to Gusbourne PLC in September 2013. The company was founded in 2004 and is based in Ashford, the United Kingdom.