The deadliest pesticide. Made in the UK, banned in the UK and exported abroad

It's responsible for killing tens of thousands of thousands of people, and yet it continues to be shipped worldwide from Yorkshire. The weedkiller, Gramoxone, is one of the most toxic pesticides in the world. On top of being responsible for thousands of accidental deaths, it has become one of the main means of suicide in poor rural countries around the world.  The company Syngenta, which produces the herbicide here in the U.K, say it's safe if used correctly. But Channel 4 News has obtained hundreds of internal company documents which show they knew their own safety data was flawed but continued to sell it.  Channel 4 News' Senior Producer Nanette van der Laan and Chief Correspondent Thomson have spent weeks delving into this story of profit before safety that has cost lives all over the world. And a warning this episode deals with issues of suicide which some may find distressing. Sources: Public Eye, Calabash TV, The Ring of Fire