That isn’t generally how it works. Flts with numbers are independent of any sqn (e.g. 1435 Flt in the Falklands) whereas flts within sqns are lettered (‘A’ Flt, ‘B’ Flt, etc.) or sometimes named.
Judging by the In Memoriam - Cadet Squadrons Lost, Closed, Merged & Disbanded thread, there are plenty of sqn numbers in suspended animation that could be reactivated for a second sqn at a given location: otherwise we go with a single Sqn HQ element with two or more co-located flts (lettered or named) drilling on different nights.
N.B. It would not be appropriate to call either of these a D.F. for the simple reason that they are not detached.