LONDON (Reuters) -Britain warned that Russia was trying to circumvent sanctions as it announced 46 new measures against individuals and groups from other countries it said were involved in Russia’s military supply chains. The latest entities to be sanctioned included businesses operating in China, Turkey, Serbia, the United Arab Emirates and Uzbekistan, Britain’s foreign ministry said. The Russian embassy in London described the sanctions as “futile” and an “act of poorly staged drama”, coming as British Foreign Secretary David Cameron visits the United States to reaffirm London’s continued su…