The incident occurred during a visit to Welland Academy, where Sir Keir made the accompanying hand gesture after a pupil mentioned page 67.
The term “6-7” is a nonsensical expression often blurted out when “six” and “seven” are mentioned together and comes with an accompanying “juggling” hand gesture.
It originated from the song “Doot Doot (6 7)” by rapper Skrilla and popularised in videos and memes featuring NBA player LaMelo Ball.