Just a quick update but note my info is based on 2010 data which I do not think has changed dramatically except for 4 RCA (GS) below.
1) There are three field regiments (1 and 2 RCHA and 5 RALC) each of which has:
a) 1 x Bde level FSCC with 1 x LAV + 3 x CP (M777 or Bison or other) (for a total of 3 teams for the CA)
b) 3 x Battle group FSCCs with 1 x LAV + 1 x LAV OPV each (for a total of 9 teams for the CA)
c) 9 x FOO/JTAC teams with 1 X LAV OPV each (for a total of 27 for the CA)
d) 2 x M777 gun batteries of 4 guns each (for a total of 8 per regiment and 24 for the CA)
e) 1 x STA Bty with
e.1) 1 x Surveillance and Target Acquisition Control centre (for a total of three for the CA)
e.1) 1 x Weapon Locating troop with 3 x LCMR and 1 x AWLS (for a total of 9 x LCMR + 3 x AWLS for the CA)
e.2) 2 x MUAV troops with 3 x drone detachments each (for a total of 6 per regiment and 18 for the CA)
Note - LCMR = Light Counter Mortar Radar; AWLS=Acoustic Weapon Locating System
Note - equipment holdings are for within units , additional holding for some equip exists at the school and as spares.
2) There is one General Support Regiment (4 RCS(GS)) which has:
f) the ability to provide above brigade level FSCC, DADC and STACC capabilities
g) 3 x Batteries - which can deploy various mix and matched elements but as of 2021 have areas of focus as follows:
g.1) 127 Bty - Air Defence and Tactical Data Links + Airspace Coordination Centres (for a total of three for the CA)
g.2) 128 Bty - 10 x Medium range radars
g.3) 129 Bty - SUAV10 x Medium Range Radar 2 control centres and 10 x SUAV Blackjack including ISTARCC and STACC capabilities
I'm not 100% up on the current status of all the above and stand to be corrected.