Boris Johnson says John Major’s claim that he has ‘shredded’ UK’s reputation abroad ‘demonstrably untrue’ – live

Latest updates: Boris Johnson responds to former prime minister's assertion that UK's influence in world has weakened under his leadership

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Newsnight's Nick Watt asks if Major thinks Johnson lied about the implications of Brexit. And he asks Major how he would respond to supporters of the PM who would say this is just Major pursuing a 30-year vendetta against Johnson since the days when he caused trouble for the Major government as the Telegraph's Brussels correspondent.

Major says that as a Brussels correspondent Johnson's reporting was often mistaken". He says the Foreign Office once offered to brief him before he published a story. Johnson replied that this would be one phone call too many".

It does help if you sign treaties if you understand them before you sign them.