After finally getting my hands on the next codex, I obviously jumped straight to the Salamanders section. I can't help feeling GW keep backing themselves into a corner with how they write our background.
7 major cities, each with a company pledged to it. Except the 7th company who are beholden to no one as they are scouts.
However it's also well established the first company have no connection to the cities due to their posting on Prometheus.
Which means there is at least one city - probably two - which is neglected by the Salamanders in terms of consistent protection/connection/recruitment from the companies. Which just feels wrong from how GW want us to perceive the Salamanders as "humanitarians".
Why not just give us 9 companies?
4 Battle line
And then the question goes away surely.