In a field in southwest England where his dairy cows graze, Adam Stanbury says he fears the government's new farm inheritance tax, coupled with existing economic headwinds, will ruin his family business and many others. The 55-year-old, the third generation to farm this land near Barnstaple in North Devon, is one of hundreds of farmers who have driven tractors to London to protest in front of Downing Street. "If nobody's listening, we have to do something. And I think there will be more protests," he says, saying the lifting of the historical inheritance tax waiver for farmers "would be the straw that broke the camel's back" for farmers. IMAGES AND SOUNDBITES ARRANGED IN SEQUENCES