[3][4][5] During auditions, Cowell allowed a change to the Golden Buzzer format, granting more being given than in previous series.
[11] Tonioli also gave an extra Golden Buzzer himself, but by accident after doing so halfway through a contestant's act; something which had never been done before within the Got Talent franchise itself.
[12] Color key: ^1 During the fourth semi-final, Noodle was revealed to be series 15 finalist Tom Ball.
Ball's identity was kept a secret by production staff throughout the series - all details listed here pertain to his unveiling as the voice of Noodle in the semi-final.
Prior to the beginning of the live shows, the semi-finalists were decided following a deliberation stage at the London Palladium.