No! Please stop assuming, mate.
I'm not Commando trained. It's also 29 Commando regiment, RA. Not 2CDO.
To elaborate, every artillery gun regiment has FSTs, weather this is at the troop level (platoon sized) as part of a gun battery or a TAC battery that is made up of purely FSTs, or both. You don't need to be commando or para trained to be a forward observer. It's a good job if you don't mind playing IED roulette with the infantry.
Anyway, to get back on track, your guide needs work.