David Cameron insisted aid spending made him "proud to be British" today as he urged more investment to tackle global hunger.
Hosting a conference intended to drum up money for the developing world, the Prime Minister backed a target of saving 20 million children from chronic malnutrition by 2020.
Bill Gates and Danny Boyle are set to address the protest rally to coincide with the London meeting, which preceeds the G8 summit in Northern Ireland.
The demonstration, hosted by lobby group Enough Food For Everyone If, is expected to attract thousands to Hyde Park.
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Photos taken by housing officers show how they could barely see the floor as it was covered with mattresses.
Safak Bozkurt, 28, also tried to sneak in four mobile phones, two charger cables and SIM cards.
The Hollywood star reportedly looked like he "switched into superhero mode" as he chased the suspect near his home.