Explained: Which investigations have been launched into claims against Russell Brand?

Russell Brand is being investigated by the BBC, Channel 4 and a production company after he was accused of rape, sexual assault and emotional abuse while working for the organisations.
The high-profile comedian and actor has denied the claims, including of controlling, abusive and predatory behaviour, which have been made by four women relating to alleged incidents between 2006 and 2013 in the UK and US.