Speaking from Strasbourg, UKIP Defence Spokesman Mike Hookem MEP said: "President Juncker speaks openly today of an EU army, something the remainers vehemently during the referendum campaign.
"He has denied he wants it to run alongside NATO but how long before he wants to replace NATO in the wake of Brexit?
"During the campaign we were lied to about there being no plans for an EU Army. Here in Strasbourg Juncker makes it clear that Brussels wants its own military and we will not have the power to protect ourselves.
"Mrs May, invoke Article 50 now to remove any doubt about Brexit. What we have here are calls for more EU, not less."