Old-Duffer,
If low squadron numbering is indeed a policy, as you claim, how do you explain the existence of 617, 230, 207, 206, 201, 115, 101 and 99 Squadrons, when lower number plates such as 15, 20, 21, 22, 26, 30 and 42 are all long gone, not to mention more famous lower numbers such as 43, 56, 74 etc who appear to have gone for ever?