Leo Varadkar and Boris Johnson famously aren’t cut out to get along. But today after Johnson visited Dublin, and the pair appeared on the steps of government buildings, the poor state of their relationship has never mattered more because if there is a deal to be unlocked it will require the two leaders to work jointly on finding a way through.

Johnson is frustrated at what he perceives to be Varadkar undermining him every step of the way – making his task on delivering Brexit impossible with his refusal to loosen the backstop. Varadkar is aghast at what he sees as the UK government’s refusal to acknowledge the sanctity of the Good Friday Agreement, and the economic catastrophe a no deal Brexit could bring to the island.