The answer on the first "Supermatch Game" is displayed before Terry Wogan asks for it to be revealed, causing him to remark "that was quick".
Around the 23'50m mark, Les Dawson pulls back a red triangle on his desk which indicates he'd matched a correct answer with a contestant. A few moments later he can be seen flipping it back down, pointing to it and mouthing what appear to be the words "this down?" to an offscreen crew member.
However, this action was probably deliberate, as when Terry Wogan comes to ask for his answer later, the triangle has been withdrawn again, with Les flipping it down in front of Terry for comic schtick.
However, this action was probably deliberate, as when Terry Wogan comes to ask for his answer later, the triangle has been withdrawn again, with Les flipping it down in front of Terry for comic schtick.