By Emma Farge GENEVA (Reuters) -Britain will join the United States and Australia in backing a European Union trade case against China at the World Trade Organization over Beijing’s alleged trade curbs on Lithuania, a move the UK trade minister said would oppose “coercive trading practices”. The EU launched a challenge https://www.reuters.com/article/uk-china-lithuania-eu-wto-idINKBN2K10F3 at the Geneva-based trade body last month, accusing China of discriminatory trade practices against Lithuania that it says threaten the integrity of the EU’s single market. “We will request to join the EU’s …