The former Prime Minister has said campaigners who want to stay in the EU need to show some of the fervour of their Brexit opponents. Mr Blair has called for them to make the case with "passion, vigour and determination". Asked if now was his time to join the campaign trail, he said: "I don't know if it's time for me on the campaign trail. That carries negatives as well as positives". He told the BBC Radio 4 Today programme he believes Britain will vote to stay in and said the UK's destiny is to "lead in Europe". Mr Blair warned that Brexit would cause economic instability and "damage fundamentally" the interests of the British people. He said: "The question is, what is in the interests of the people? "And I would like to see the pro-European side get out there with a bit of passion and vigour and determination and stand up for what we believe. "And what we believe not just as a matter of economic realism, but as a matter of political idealism." Why is Blair lying about supposed influence UK has in the EU? Our view dismissed more than all other EU states. pic.twitter.com/x2vbLyf975 — Anne-Marie Trevelyan (@annietrev) March 11, 2016 "I think the British people are sensible, " he said. "You can't have a referendum like this, especially with the fervour on the anti-side, and not be concerned. "So I am concerned but I belive in the end we will vote to stay." Tony Blair backs #Remain in #EU!



(This may not be one of my best arguments, but hey: Isn't that a good reason for #Brexit?) — Michael Fabricant (@Mike_Fabricant) March 11, 2016 Renegotiation of Britain's EU membership