I didn't see the programme, but I did watch the acts on Youtube and the ones I saw I thought;
Escala - not good. As someone said, like that group Bond, but playing was BAD. Tuning all over the place, squeaky notes, much more emphasis on the looking provocative than the music. And I really HATE these pseudo classical pieces with heavy drum beats - there are about 2 good ones - including Sky's Toccata, but generally they are just annoying.
Kate and Gin - really cute - she did really well, training Gin, and obviously really shy, must have taken a lot of courage for HER to go on, and amazing that the dog wasn't phased by the lights and the audience.
Andrew - nice voice, not outstanding for a head chorister, but obviously good singer. Have heard far better choristers without looking too far afield! It irritated me that the whole bullying story seemed jumped up - his mum said that the bullying happened a long time ago, and that the media had manipulated their story to make it seem like 'good kid from bad area' whereas where they live is nice!
Faryl - beautiful contralto voice - seems a very unspoilt girl, I thought she was excellent.
Signature - funny! I liked them!
George - gutsy kid, I guess if you like break dancing then he was good, it's not my thing, but he did it well.