Foreign Secretary Liz Truss has accused Russia of "weaponising hunger" and using food security as a "callous tool of war" with its blockade of Ukrainian grain.
Ukraine has been described as the "bread basket of Europe" and was one of the world's largest exporters of wheat, corn and sunflower oil.
But the Russian invasion and Moscow's sea mining to prevent access to the southern ports, including Odessa, has halted much of the flow and jeopardised world food supplies.
