Homeland star David Harewood insisted that "there can be enough food for everyone". Speaking at today's rally he added:
"We've already changed the diaries of the G8 leaders, we've already changed their agenda. Now we just need to remind them they need to change the world. That's why we need all of you to speak up today."
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The Met Office has weather warnings in place for snow and ice until 10am in the north and west.