Is Boris being too defensive on the culture wars?

Reports on Sunday suggested the BBC was going to drop 'Rule, Britannia!' and 'Land of Hope and Glory' from its Last Night of the Proms schedule because of the songs' associations with slavery and colonialism. Boris Johnson hit back at the broadcaster today, however, calling for an end to 'this general bout of self-recrimination and wetness'. But was the Prime Minister's response strong enough? Cindy Yu speaks to Fraser Nelson and James Forsyth.