Who decides when to pull the Article 50 trigger?

One viral video, doing the rounds on social media, shows a cat in a Union Jack flag scratching to be let out through a door marked "Brexit". As soon as the door opens, the cat looks at the door, then at the man who opened it, then back at the door…without moving.

It’s now six weeks since 52 percent of Brits voted to leave the EU. But if Article 50 is now the most talked about section of the EU treaty (in London at least), we are no closer to seeing it put into action.

The apparent...