Britain's Got Talent 2015: Stephen speaks to tonight's finalists! (Semi-Final 1)

Britain's Got Talent 2015: Watch the nail-biting result of the first semi-final (Semi-Final 1)

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

Britain's Got Talent 2015: Skating siblings Billy and Emily England are in a spin (Semi-Final 1)

Britain's Got Talent 2015: Will lightning strike twice for singer Henry Gallagher? (Semi-Final 1)

Britain's Got Talent 2015: Dance troupe Entity Allstars are magic! (Semi-Final 1)

Britain's Got Talent 2015: Lorraine Bowen's singing is out of this world (Semi-Final 1)

Britain's Got Talent 2015: Impersonator Andrew Fleming's not bitter (Semi-Final 1)

Britain's Got Talent 2015: Mitch & Cally The Wonderdog have a pop at the world record (Semi-Final 1)

Britain's Got Talent 2015: If only Becky O'Brien could make it through to the final (Semi-Final 1)

Britain's Got Talent 2015: Burlesque Performers Ruby Red let it all hang out! (Semi-Final 1)

Britain's Got Talent 2015: Mitch & Cally The Wonderdog have a pop at the world record (Semi-Final 1)

Britain's Got Talent 2015: Jonathan Lutwyche is only human (Semi-Final 5)

Britain's Got Talent 2015: Will Peter Lambert get the axe? (Semi-Final 5)

Britain's Got Talent 2015: Musician Isaac Waddington can't make you love him (Semi-Final 4)

Britain's Got Talent 2015: Lisa Sampson's playing with fire! (Semi-Final 4)