High-level delegations from the United States and China are meeting in London to try and shore up a fragile truce in a trade dispute that has roiled the global economy.

Trade talks between the U.S. and China in London are going well and could spill into a third day, U.S. negotiators said, as the two superpowers pushed for a breakthrough on duelling export controls that had threatened to unravel a delicate tariff truce.