Following the discovery of fatigue cracks, developing due to their low-altitude usage, the B.2R strategic bombers were retired and placed in storage by the end of 1968. The RAF had experienced intense demand on its existing aerial refuelling tanker fleet, and its existing fleet of Victor B.1 tankers that had been converted earlier were due to be retired in the 1970s, so it was decided that the stored Victor B.2Rs would be converted to tankers also. Handley Page prepared a modification scheme that would see the Victors fitted with tip tanks, the structure modified to limit further fatigue cracking in the wings, and ejection seats provided for all six crewmembers. The Ministry of Defence delayed signing the order for conversion of the B2s until after Handley Page went into liquidation. The contract for conversion was instead awarded to Hawker Siddeley, who produced a much simpler conversion than that planned by Handley Page, with the wingspan shortened to reduce wing bending stress and hence extend airframe life.