Is it time to start calling out bad cyclists?

If you look it's also in the course 2 above as well, and I suspect behind the roadsign.

I'd guess that it's something to do with the exact length that the wall needed to be. As it's by the street sign, that might suggest that it's towards the end of the wall, and the builder knew that unless that was done, the wall would be half a brick too long.

OK. Thread hijack over. I can't believe I've spent the last 10 minutes looking at a wall on Google maps. Just to put it to bed. I think the end of the wall has subsided and someone's shored it up and changed the pattern. If you look at the rest of the wall though.......

Aarrgh. No.