First, a disclaimer: I was in the same room as other people watching Britain's Got Talent, OK? I was trying to read a book but the TV was distracting. I would have gone elsewhere but I was trying to maintain a semblance of being sociable.
Anyway, during the show, a couple of contestants stuck out as being well above the average level of talent (ie they did actually have some talent) - Jack Carroll, a 14yo comic with cerebral palsy, and Alice Fedenham, a painfully shy 28yo singer who didn't know how good she was (she was very good). I googled both names and quelle surprise, it turns out both have some performing history - Jack won a Pride Of Britain award last year, earning himself a visit from Jimmy Carr, and is already widely known as a "YouTube sensation", while Alice was a candidate for the new series of The Voice but didn't make it through to the TV auditions. I assume these people were invited (whether directly or indirectly) to audition for BGT. I didn't bother googling the cute 11yo singer who has clearly been coached to within an inch of her life, or the stunningly good Hungarian shadow puppet theatre act, but I'm assuming they probably had their travel expenses from Budapest paid by the show's production company...
Cynical, moi?