Was there a Christmas party in 10 Downing Street last year during lockdown? The Mirror received a tip-off from an anonymous source, alleging that a party took place. ITV News then secured footage of Downing Street aides joking about a party. How did the journalists involved get hold of these stories, and what did they do to 'stand them up'? These two scoops dominated Prime Minister's Questions and every news bulletin. So, what is the relationship between the government and the Lobby?