Welsh choir Côr Glanaethwy raise the roof | Semi-Final 1 | Britain's Got Talent 2015

See more from Britain's Got Talent at http://itv.com/talent The 160-plus-piece choir from Wales had the audience and the Judges enthralled with their mesmerising audition. But will their semi-final performance be the answer to their prayers?  See more from Britain's Got Talent at http://itv.com/talent SUBSCRIBE: http://bit.ly/BGTsub Facebook: http://www.facebook.com/BGT Twitter: http://twitter.com/BGT