The Apprentice's Ben Clarke was reportedly fired from his day job for boasting about getting on the BBC One show.
Former colleagues of the trainee stockbroker said that he annoyed bosses and had "the biggest head in the world" after winning a place on the series.
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"As soon as he knew he had been selected to audition for The Apprentice, he became unbearable," a Brewin Dolphin worker told The Sun.
"He would swagger around the office like he was a master of the universe. He'd tuck his thumbs under his braces and strut about. He kept saying, 'I'm leaving you losers and going to win The Apprentice'. We all laughed - until we realised he was serious."
The insider added: "Then the bosses found out - and he was sent packing."
