Hm, I don't think there's much doubt that what dropped on the place had "Police" painted all over it and was crewed by Police officers. The rest is surely their concern: quibbling about irrelevancies is of course the ultimate refuge of the irresponsible, and irresponsible policing is something we've seen quite a bit of, as power has corrupted rather too much. The appropriate part of the Bond enpire who were responsible for maintaining it, or not, are only Agents ;)
Or is this Clutha Farewell as some property speculator slips backhanders somewhere until the owners give up and it can become another anonymous glass monolith?