Should have read "....also 22 squadrons between Dec 62 and Mar 63 (8 Valiant, 5 Victor and 9 Vulcan)."
The peak of 22 was first reached when 12 Sqn reformed with the Vulcan B2 in July 1962, remaining at this total until 7 Sqn disbanded as a Valiant squadron at the end of September 1962. This reduced the total to 21 until 35 Sqn reformed on the Vulcan B2 in December 1962, bringing the total back up to 22.
At the end of March 1963, 18 Sqn disbanded as a Valiant squadron. This dropped the total to 21 squadrons; the total remained at this level until the end of February 1964 when 10 Sqn disbanded as a Victor squadron, reducing the total to 20.