Andrew Grice in the Indy this morning tells us why:
There was an embarrassing hiccup before Gordon’s arrival: the logo for today’s summit of world leaders bore an uncanny resemblance to a Nazi swastika. Downing Street removed the logo from its website and ordered the designers to come up with a new one. “It would be totally wrong to read anything sinister into the intentions of the designers,” said a No 10 spokeswoman.
It would, however, be right to laugh at their serial incompetence.