Ant and Dec present the sixth audition show, as the judges - Simon Cowell, David Walliams, Amanda Holden and Alesha Dixon - give their verdicts on more of the nation's best - and worst - performers. Queuing up to take the stage, acts of all ages and abilities are determined to prove they're worthy of the £250,000 cash prize and a slot at this year's Royal Variety Performance, but while some of them will be deserving, the dream will be over for those whose auditions are cut short by the panel.