At his first audition , screened on 13 April , the judges unanimously voted him through to the next round .
Carroll was a contestant on the seventh series of Britain 's Got Talent in 2013 .
At Carroll 's first audition , screened on 13 April , the judges unanimously voted him through to the next round .
Carroll was a contestant on the seventh series of Britain 's Got Talent in 2013 .