Bicycle Tag of bike

BarclaysBike?

/nothelping

That mosaic is one of many decorating The Treatment Rooms, the home of utterly splendid mosaic artist Carrie Reichardt. You can read about it here and see more images here, here and a set of the Luiz Ramirez wall here.
If you wish to read more about the quite sickening case of Luiz Ramirez, I suggest you start here

Isn't the point of the game to discover the location? (Katie-coo introduced me to this thread on the way back from Dunwich).
Bit of a hefty clue here^ no?