How much power do our newspapers really have? John Witherow has been at the heart of Fleet Street for decades, He is one of the longest-serving national newspaper editors, first at the Sunday Times and now The Times, exposing cash for honours, abuse in Rotherham and corruption at Oxfam. But what role has his paper played in exposing the Partygate scandal that could bring down the prime minister? And what does this tell us about the relationship between the press and those running the country?