ELTSAC CASTLE remained in situ throughout the 1990s, it can be seen in Gary McCormick’s Heartland episode, Dunedin North. Coming of Age (1995). The flat was later renamed The Jungle.
Thanks to a comment from a current resident (below), it can be confirmed this flat is still called Thirsty Boys, not Maiden Thirsty, as referenced on the mural.
This sign, BΔΞ, has been made using a skateboard deck. The Greek text is underscored by, what appears to be, three Speights stars.
The Greek letters (Beta Delta Xi) represent a fictional fraternity – the same name was used in the popular movie American Pie.