Multiple broadcasting and production companies are investigating after four women made separate accusations of sexual assault against Russell Brand while he was presenting on the broadcasters’ shows.

BBC, Channel 4 and another production company are looking into the situation, as the comedian and actor has been accused of rape and sexual assault between 2006 and 2013, while he was at the peak of his fame.

Claims were made as part of a joint investigation by The Sunday Times, The Times and Channel 4’s Dispatches.

In a video posted to his YouTube account, Brand denied the allegations, saying that all his relationships have been “consensual”.

The BBC is “urgently looking into the issues raised” while Brand worked on radio shows for the U.K’s national broadcaster from 2006 to 2008.

Channel 4 has also announced it’s conducting “its own internal investigation”.

"We will be writing to all our current suppliers reminding them of their responsibilities under our Code of Conduct, as we are committed to ensuring our industry has safe, inclusive and professional working environments," read a Channel 4 statement.

Brand was accused of seeking sex from audience members while presenting EFourum and Big Brother’s Big Mouth on the channel.

One researcher claims that Brand’s behaviour was reported to production members at Endemol, who were commission by Channel 4 to produce the shows.

The Metropolitan Police in the U.K said it will speak to The Sunday Times and Channel 4 to make sure that anyone with information on sexual crimes “are aware of how they may report any criminal allegations to police".