That glorified bit of corridor/balcony/mezzanine/atrium (whatever) is classed as a "studio"?!
I might start classifying the front porch of my house as a "conservatory", then...
It's a designated production area, that can work standalone, with all the routing in and out that entails, so while it's not a studio in the traditional sense, it needs a name, and it's not really any different to the greenscreen weather / clip studios, or the multipurpose spaces dotted around the building, all of which have "Studio XX" designations.
IIRC, outside source normally uses studio A's gallery anyway.