European nations have boosted their defences in response to the annexation of the Crimean Peninsula in 2014 and Russia’s invasion of Ukraine, a London-based think tank has said. But a report released by the International Institute for Strategic Studies says much remains to be done before European countries are fully ready to face down further threats from Russia. “NATO has not just significantly increased its ambitions regarding its deterrence and war-fighting posture, but European members have sought to address critical capability and readiness shortfalls,” part of the report, released at the…