Veteran broadcaster Stuart Hall took his first alleged victim to the BBC Studios in Manchester on the pretext of showing her how to be a makeup artist, a court heard.
Once there, she was plied with alcohol in Hall's personal dressing room in the Oxford Road complex, and assaulted, the jury heard.
"We say he realised she was not consenting. It was obvious," Peter Wright QC, prosecuting, told the jury. "Yet he pressed on and had sex with her regardless."
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The annual event has earned a place in the record books ahead of the grand final of the 60th anniversary show in Austria this evening.
Local authorities said the move is necessary to "avert the growing number of deaths and increasing harm linked to psychoactive substances".
Some students argued that the centuries-old tradition of wearing gowns, suits and mortarboards to exams was 'archaic' and looked elitist.