In notes, the nanny described being called a “whore, a bitch and a slut” for no reason.
Following her death, more than eight hours of “harrowing” recordings were recovered from the defendants’ mobile phones of Lionnet being interrogated.
They depicted “a young emaciated, frightened and helpless woman anxious to say and do whatever her two tormentors wanted her to say”, Horwell said.
“The last days and hours of Sophie’s life must have been truly wretched,” he added.
“She was subjected, at times, to a brutal and oppressive inquisition and to significant violence.”
After Lionnet’s death a silent march was held in her memory in October, during which around 30 of her friends and family gathered in her London neighbourhood.
During the vigil her cousin Melanie Lionnet told AFP that Sophie had been “tired” and wanted to “go back to France” before her death.
The victim’s parents sat in the well of the court as the trial opened on Monday.