During a joint visit to a military base in Estonia with the French president, Emmanuel Macron, the prime minister said threats from Russian aggression to illegal migration and cyber security made security in the union increasingly vital, The Guardian reported.
“When a nation like Russia deliberately violates the rules-based international order that we have worked so hard to create, we must come together with our allies to defend that international system,” May told British troops based in northern Estonia.
May added: “The United Kingdom is unconditionally committed to maintaining Europe’s security and we will continue to offer aid and assistance to EU member states that are the victims of armed aggression, terrorism and natural or manmade disasters...
“While we are leaving the European Union, as I have said many times, we are not leaving Europe so the United Kingdom is unconditionally committed to maintaining Europe’s security.
“Russia’s continued aggression represents a growing danger to our friends here in Estonia as well as Latvia, Lithuania and Poland, and our response must be clear and unequivocal.
“By stepping up NATO’s deterrence and defense posture you are showing that we are equipped to respond to any threat that we face. You are showing that we are ready to do so.”
May is in Estonia for a summit of EU leaders. She arrived on Thursday for a meal with 26 other leaders, who vowed to remain united through the Brexit talks.