In the fourth round, Madeline Smith asks if she's got the answer "wrong". As the contestant hadn't yet given their answer, there would be no way to know if she hadn't got the match, and as there are no "correct" answers in the game, her query makes no logical sense.
The "ready" lights of the panellists keep going off during the first game with the second contestants.
The revolving set to reveal the second set of contestants judders when it stops, causing the contestants to wobble in their seats.
The pull back slide to reveal the question in the first "Supermatch Game" takes an unusually long time to draw back, even by the usual standards of the show, getting stuck more than once along the way. "Good Lord, look at that" says Terry in response.