Copper prices in London snapped a five-session losing streak on Friday as comments from a senior U.S. official that Washington and Beijing are getting close to an interim trade pact lifted hopes of demand for the metal, used as a gauge of economic health. The United States and China are getting close to a trade agreement and talks are "very constructive", White House economic adviser Larry Kudlow said, while Beijing said they are holding "in-depth" discussions with Washington.