If you watched BGT judges Amanda, David, Alesha and Simon trying to recall as many of the Britain's Got Talent winners and contestants as they could from the past nine series, you'll know that the first three struggled to get past single figures. Simon came off the supremo with over 40 – and so he should! (Not that we can be absolutely certain he wasn't being prompted...) But how many of the outright winners from the nine series can you remember? And who's already proving memorable in Series 10?