Hundreds of campaigners, including fashion designer Vivienne Westwood, will make their voice heard today with a protest at the Department of the Environment.
They are urging Environment Secretary Owen Paterson not to block an EU proposal to suspend the use of certain pesticides.
A vote will take place in Brussels on Monday which will decide whether Europe agrees to introduce a two-year suspension.
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This leaves a previous ruling against Brendan Dassey in place.
The Duke of Cambridge followed in the footsteps of his wife who lived in the Middle East country as a child.