1) what caused the scenario whereby David Walliams was filmed snogging some bloke on the judges desk and used in trailers for the shows but never aired.
2) how come all the acts turn up to the decision day all in the same costumes/attire even though some of them are from hundreds of miles away
3) why if there were 200 acts through, why was it just the acts that were aired throughout the auditions that were ever in the waiting room. I do not believe that any other acts, other than those shown were put through. Where were all the other 160 acts that failed to get through to the semi's.

Told by the producers that they weren't taking them any further weeks ago. At a guess the few they said no too on the TV was for us viewers entertainment.

Who was Alesha shouting "Get off the stage" to which was shown in some of the trailers but was never shown on the main show?

It was ridiculous that the hula hoop woman was in her costume. As if she would go to London for the results dressed like that. She even had no shoes on!

In terms of number three, there was one act that wasn't aired. I don't remember seeing the act with those people in fancy dress costumes.

Ref the costumes, they are told they have to wear the same as on their audition. (I've read this in interviews from past years)

Yes, they will be asked to wear the costumes to make themselves or the act easily recognisable to the audience. Otherwise you´d have a room full of people wearing jeans and T shirts and wouldn´t be able to tell hula hoop woman from anyone else!

Someone came on stage and was rude to Amanda, Alesha told them to get off...wasnt aired but Alesha spoke about it on twitter and someone posted here so thats how i know about it