Reports are coming in that the Animals In War Memorial in Park Lane has also been defaced. More details to follow.
More top news
Campaigners have vowed to block the building of a £50 million Holocaust memorial that is due to be built next to Parliament.
The vulnerable 64-year old was last seen in Hoxton at 10.45pm on Thursday 8 December.
Two men have been jailed for a total of 18 years after they were stopped in a mini-cab bringing 10 revolvers into the capital.