There’s a piece here on Digit magazine’s blog about the ‘under construction’ symbols currently displayed on the hoarding on our building. (Above.)

They write that after spending a while trying to work out what it was advertising they realised, "It’s not an ad as such. The building behind is actually
the agency’s London offices and the symbols are just there to cover up
the chipboard, turning every studio’s nightmare when trying to pitch to
clients – the noise and ugliness of building work – into a showcase for
the company… Ignoring the fact that it’s commissioned by W+K as essentially an promo
for itself, this is a piece of art not advertising — though after
years of guerrilla advertising and viral marketing, your first instinct
is to wonder what it’s selling. How long before we start regarding all
street art from graffiti to pavement chalk paintings in this way?"

Brilliant – so we may have inadvertently created a whole new sub-genre of urban spam.