Donald Trump has been accused of sexually inappropriate behaviour by more than 20 women, but he has dismissed them all as liars. Now one of those women is suing him for defamation. An American court will have to decide what really happened and whether the President of the United States is a sexual predator. So what is the truth about Donald Trump's behaviour towards women? In the week of his visit to Britain, reporter Richard Bilton investigates new allegations about Mr Trump and meets the women who say the president is a sex pest.