British farmers massed in London on Tuesday for protests against controversial government plans to change inheritance tax rules for land ownership, which they claim threatens to break up the sector and hit food production.

British farmers have descended on Parliament to protest a tax hike they say will deal a “hammer blow” to struggling family farms

Thousands of farmers flooded the streets of London protesting an inheritance tax on agricultural land that they say would devastate family farms. The U.K. government says the tax would mainly affect rich individuals who bought farmland as an investment.