When I came into work yesterday, this is what could be seen from the windows:
One of the guys looked at the London Fire Brigade website, and, as it turns out, this was a school, now empty for the summer holidays. I grabbed my camera and took a few shots and then went back to work. An hour later, the smoke was still thick and I took a few more photographs. All credit to the firefighters, who obviously had a difficult time getting it under control.
I just hope it was not deliberately set.