The knickerbocker glory is mentioned in the novel Harry Potter and the Philosopher's Stone, along with a UK sitcom called One Foot in the Grave (Series 6, entitled "Tales of Terror").
The knickerbocker glory is mentioned in the novel Harry Potter and the Philosopher's Stone, It is ordered by Dudley Dursley while at a zoo restaurant. It is also mentioned in a popular UK sitcom called One Foot in the Grave (Series 6, entitled "Tales of Terror").