The Reference Desk/Vega, Vegan and Vega Nexos in The Monster of Peladon

Can someone outline exactly how the character of Vega Nexos (The Monster of Peladon), their species/planetary demonym, and their home planet is described in The Monster of Peladon?

There's a character in The Bride of Peladon, Elkin, that's said to be from a planet called Vega Nexos, and also, while none of the pages in the title have a {{conjecture}} or {{demonym}} tab the page for Vega Nexos says "presumably the Vegans", as if Vegan (The Monster of Peladon) is conjecture.

Seeing how Bride is a sequel to earlier appearances of Aggedor and Alpha Centauri, I can (even if I shouldn't) assume Elkin is intended to be the same species, especially as both seem to be related to the mining on Peladon.

So, to summarise, is there one instance in Monster where a planet is called Vega and just Vega, and a different instance altogether in Bride where one's called Vega Nexos?

I don't think any real visual description is given in the audio of his, or any alien species' appearance other than, "Is that one of the miners?" "No, look at his eyes. From Vega Nexos, I'd say." (Disc 2, track 14, 0:33)