sentences:  55 Squadron did not reform until 1 September 1960 at RAF Honington, when it became part of the RAF's V bomber force, being the fifth squadron equipped with the Handley Page Victor when it received Victor B.1As.When the Vickers Valiant was grounded in December 1964 owing to metal fatigue, the RAF lost its aerial refueling tanker force, and a rush programme was launched to convert Victor B.1s to fill the tanker gap.From May 1965 when it moved to RAF Marham, 55 Squadron received six interim two-point Victor BK.1A tanker conversions, allowing it to become operational in the tanker role in August 1965.