RCO Orgins? Socialist Alliance split?

Does anyone have more information on the origins of the RCO?

I’ve been curious about the origins of the RCO and tried looking into it, but I only found a couple of sources. The most informative one was a Spotify podcast by Platipus, where they interview members of the RCO.

The Spotify Podcast in question for those curious.

In the podcast, they mention that the RCO emerged as a project to unite the left after COVID, however specifically, it grew out of a split with the Socialist Alliance, with a reading group forming around this division, eventually evolving into the RCO. However, if I remember correctly, they don’t go into detail about what caused the split or what the disagreement was about, and that’s something I’d like to know more about. We can of course speculate extensively based on this, but it would be good to have some more concrete details.

Does anyone, perhaps from the Socialist Alliance or RCO, have more details on this?