Backing track for Cold Play's Us Against The World - ending of performance

This is the song we are using for the very end. Our piece finished by all of us uniting together, (however some people do choose to stay in the church) and walking outside together. This will then leave our piece on a cliff-hanger which then enables our audience to decide from themselves whether they think we are all going to die or whether we live. However, quite a few scenes back Stevie decides to walk out of the church due to everyone blaming her for the riots seeing as she is 'The Prime Minister'. After she leaves we all assume that she gets killed and we make this clear as me and Joe call the others murderers, because of this our piece may not feel like a cliff-hanger but we still like the idea of leaving the audience questioning whether we do die or not.
Jay starts the song off and eventually we all come in gradually, symbolising we are all in this together and its us against the world, cliche I know but it works nicely!