LONDON (Reuters) – Russia is committing an increasing number of its forces to encircling key cities in Ukraine, slowing its advance through the country, Britain’s defence ministry said on Thursday. “Due to strong Ukrainian resistance, Russian forces are committing an increased number of their deployed forces to encircle key cities. This will reduce the number of forces available to continue their advance and will further slow Russian progress,” the ministry said in an intelligence update posted on Twitter. The defence ministry also said protests against Russian occupation have been reported th…