Two HP.80 prototypes, "WB771" and "WB775", were built. "WB771" was broken down at the Handley Page factory at Radlett and transported by road to RAF Boscombe Down for its first flight; bulldozers were used to clear the route and create paths around obstacles. Sections of the aircraft were hidden under wooden framing and tarpaulins printed with "GELEYPANDHY / SOUTHAMPTON" to make it appear as a boat hull in transit. GELEYPANDHY was an anagram of "Handley Pyge", marred by a signwriter's error. On 24 December 1952, piloted by Handley Page's chief test pilot Hedley Hazelden, "WB771" made its maiden flight, which lasted for a total of 17 minutes. Ten days later, the Air Ministry announced the aircraft's official name to be "Victor".