It’s the morning after the night before. A bleary-eyed nation has emerged from its slumbers to try and make sense of an election result that seemed unfathomable just days ago.

And, down on Worthy Farm in Pilton, Somerset, site of the legendary Glastonbury Festival, the event’s co-organiser, Emily Eavis, is reliving a similar day this time last year.

Back then, it was the Brexit vote that cast a shadow over the festival’s opening day. Today it’s Labour’s unexpectedly good, if ...