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.
More top news
New travel report looks at best value European city break destinations for UK tourists.
The bodies of two other crew members from the helicopter that crashed into the Atlantic over a week ago have yet to be recovered.
The man who sold himself to Americans as the ultimate deal-maker has had to back down over his planned healthcare reforms.