Some of the installations in my local area (Dunoon) are ... interesting, to say the least, so I got them while I was out taking photos this weekend. The following two in particular make me chuckle whenever I see them:
These triangular lamp posts seem to be particularly feeble, and incapable of properly supporting what they're designed for. In fairness, I imagine they weren't intended for use with anything much heavier than a Beta 5 - but the council seems to know how flaky the brackets are, as every few months they seem to mysteriously tighten up!
This second one, which isn't an isolated example I may add, seems to have been a wise decision seeing how heavy an Arc is. The council have decided to forgo the bracket entirely and instead simply shove it on to the post top!
The grub screws are sticking way out of the back, so I'd bet you a tenner they've literally plonked it on the post and tightened the screws into it hoping for the best. Possibly a bit unconventional, but as it's a triangular post it seems to do the job!