This afternoon MPs were debating Brexit, so naturally the Commons was in uproar. This time, though, it wasn’t Labour versus Tories. It was Labour versus Labour.

To be specific: it was Labour versus Frank Field, one of the few Labour MPs who campaigned to leave the EU. Mr Field, who represents Birkenhead, had tabled an amendment to the EU Withdrawal Bill. Mr Field wanted the bill to guarantee that the UK leaves the EU on the very first second of March 30, 2019. The Government wants to guarantee that the UK leaves the EU an hour earlier, at 11pm on March 29, 2019, but Mr Field considers this a spineless concession to Brussels: in his view we must leave at midnight Greenwich Mean Time, rather than midnight Central European Time.

“It’s about freedom,” he told MPs stoutly. “British time, not European time.”

His Labour colleagues did not look impressed. They looked even less impressed, however, when he appeared to argue that most Labour voters supported Brexit.

“Give way!” they shouted, leaping up in their dozens and gesticulating irately. Mr Field was surrounded. Helplessly he gave way to Stephen Doughty (Cardiff South & Penarth), who demanded he correct the record: most Labour voters had actually voted Remain.