Dozens of companies have announced they will no longer be advertising on the Spanish version of the TV reality show Big Brother after it emerged that a contestant had been shown footage of her alleged rape.

Carlota Prado was sent to the diary room to watch a video of how a fellow contestant apparently had sex with her when she was unconscious after drinking.

"Please, Super, stop now, please," a tearful Ms Prado asked. But the tape continued to play, with the Voice saying: “We think you need to see this, Carlota.” The scene was never broadcast but was leaked to the Spanish press this week.

Until being asked to enter the diary room, Ms Prado had no idea of what had happened the previous night in her bed after she had been helped to lie down by José María López, her fellow contestant with whom she had started a relationship with in the house.

According to footage of the alleged rape, she said “no, I can’t” to Mr López. But he then got into bed with the prone Ms Prado and allegedly had sex with her for several minutes before the show’s production team spoke over the bedroom speaker to interrupt him.