Problèmes à Gogo: the thread about the Bonnington Bridge Bar

If you're at all familiar with the district of Bonnington then you may well know a burnt-out ruin on Newhaven Road. It's been this way long enough that you might not remember it being anything else. It certainly poses many questions. For a start; what was it, and how did it come to be in this sorry state? What are those over-grown terraces on the riverbank beneath it? And just what does the mysterious plaque for "Uranus Art Garden" refer to? This thread has a gogo at trying to answer these questions as it looks back through the annals of the Bonnington Bridge Bar and the troubled last two decades of its life.