There is a number haunting British politics right now and, oddly enough, it is six and seven (yes like the viral 6-7 meme). Last November, Keir Starmer visited Welland Academy in Peterborough to speak about free school meals when a pupil pointed out they were on page 67 of their workbook. Starmer flashed the now-viral "67" hand gesture, the classroom burst into laughter, and a teacher jokingly told him off. As he walked out, the prime minister grinned and said, "I didn't start it, Miss." Six months later, he is saying much the same thing about the crisis now threatening his premiership. The numbers, however, are becoming harder to laugh off.