Not quite. The SGSA is the regulatory body that operates stadia licensing in the UK, providing guidance to and oversight of Safety Advisory Groups. They’ll advise on what are the legal requirements for clubs to follow, and it’ll be the SAGs themselves that implement this. The SAGs will have an SGSA rep on them to provide advice.
It’s the SGSA that have taken the lead on delivering the safe standing trials, and on ensuring these had a body of evidence to convince the Government to go ahead and open safe standing up to wider implementation by clubs.
I don’t know the ins and outs on what’s happening with the stewarding (on this thread multiple reasons for their heavy handedness have been suggested) but what is inevitable now that safe standing can be brought in is that safety authorities will be expected to enforce seating in seated areas (Burnley is another that’s been active recently on that). That’s not actually a bad thing per se, so long as there is licensed standing where people that want to enjoy the game standing can do so. However right now, we don’t have that. Converting the back of the Kop to safe standing would seem a fairly obvious solution for all.
We’ve measured the rows, and consulted a few of the experts on this, and from a purely logistical point of view, the current Kop would we believe be able to have safe standing (see out
FAQs page). Whether the funding, and will, is there to do so is another issue entirely, but remember the SGSA haven’t brought safe standing in just as a nice thing for fans - they are more interested at how to effectively manage persistent standing. Clubs could previously say there wasn’t much they could do if people stood in seated areas. That’s not the case now, and clubs will likely be under more pressure to do something about it.