The stainless steel columns of the memorial in Hyde Park, central London, were daubed with red and black slogans overnight with the messages "4Innocent Muslims" "Blair Lied Thousands Died" and "J7 Truth".
The unlicensed events unfolded on Saturday night at Clapham Common and Tooting Bec Common.
A 37 year old man who was taken to hospital after getting into difficulty in a stretch of water near Maidenhead has died.
Jonty Bravery, who is mentally ill, has been jailed for 15 years after throwing a six year old boy from the Tate modern balcony.