I qualify via the second route (1260 unknowns and 104 multis).
We'd been stuck in a traffic jam on the roundabout for five minutes: annoying usually but on this occasion it meant we were able to have a long look at possible hiding places as I drove slowly past.
I parked up around the corner and walked back. We thought we had identified the lamp post (maybe once it was shiny). It was still very busy and we didn't want to draw attention to ourselves, so I pretended to do something with the backpack while Bobcat checked the crash barrier. Nothing. Then the two places next door. Nothing.
Hmm ... we went off to see if there was anywhere better to search. No. So back to the original place with me searching this time. Yes - though I nearly missed it.