This is the sole B1 variant to survive. Victor XH648 was originally built as a B1 model. Its first flight was on 27 November 1959 and it was delivered to No.57 Squadron at RAF Honington on 21 December that year.
In October 1960, it returned to Handley Page at Radlett, Hertfordshire for conversion to a B1A status. After 4 years with 15 Squadron and 1 year with 55 Squadron it was converted by Handley Page into a two-point tanker, making it a B (K) IA model. This involved the fitting of Mark 20B refueling pods under each wing. After ten years with 55 Squadron at RAF Marham was transferred to 57 Squadron, also based at RAF Marham, where it supported the Squadron’s final year as a Mark I tanker squadron. It was retired to Duxford on 2 June 1976.