Russell Brand's relationship with Katy Perry was omitted from from the prosecution's opening arguments
A reference to Katy Perry, Brand's ex-wife, was omitted from the prosecution's opening arguments - PA/Ian West

Katy Perry may have witnessed one of Russell Brand's sexual assaults, it can be revealed.

The American singer, who was married to Brand for two years, was airbrushed out of the prosecution case against the comedian despite claims she possibly saw him placing his face in a woman's groin while recording a project for Channel 4.

Before the trial, it was said that she may have been in the room when members of Brand's production team asked a female Channel 4 employee to give the presenter a massage, moments before he put his head in her lap, angled towards her vagina.