According to Vehicle Unit Signs: Sep 77 --- Oct 81
Under: Field Force Comd, 1 Armd Regt = 30 --- Comd HQ 1 TF
Under: HQ 2 Div 1/15 RNSWL = 37 --- Comd HQ 2 Div
" " " " 2/16 HRL = 32 --- Comd HQ 2 Div
Under: HQ 3 Div 1/19 PWLH = 32 --- Comd HQ 3 Div
" " " " ' " " A Sqn 1/13 VMR = 38 --- Comd HQ 3 Div
Under: HQ 4 Div A Sqn 3/19 SAMR = 32
Under: HQ 5 Div A Sqn 10 LH = 32
Under: Comd 1 TF 2 Cav Regt = 32 -- Comd HQ 1 Div
Under: Comd HQ 3 TF, B Sqn 3 Cav = 34 --- becomes 3/4 Cav
Under: Comd HQ 6 TF, 4 Cav = 33 --- becomes 3/4 Cav = 34
Under: Comd HQ 1 FF Gp, A Sqn, 2/14 QMH = 32 --- Comd HQ 7 TF
If that all makes sense.