It's my pleasure, Captain Slow [tonguewink]
Correct. Beer reticulation system. Not the marble bar, but this particular pub I worked at (and this beast I had to contend with) had about 12 beers on tap, across 7 bars. All serviced from one cellar. You are looking at part of the Carlton Dry and XXXX gold lines, distribution panel.
When the job came to clean the beer lines out (you flush a cleaning solution thru them) if the temps were too cold, it'd freeze, and in extreme cases could rupture a line.
Everyone should sink a schooie for their local beer plumber.
Bonus pic- looking back the other way (into the affray).
https://www.aulro.com/afvb/images/im...017/06/550.jpg
Over to you, Billy!