World Rivers Day (i.e. Sunday).
Can you work out from it which direction the river is flowing?
For extra bonus marks, if I were to say the building on the right used to be a brewery, what animal would you see if you were to look up?
Updated: Chris is correct! The direction can be worked out because in London most satellite dishes point SE to SSE, so the river is flowing north. It's the Wandle River which passes what used to be the Ram Brewery, hence:
Soon to be developed into lots and lots of apartments (e.g. in a 36 story tower block).