Big Bang Beryl was one of the Resistance Bunnies at the Lady Be Good Club on Twentica, an alternate dimension version of Earth stuck in the 1920s where science and technology were prohibited by the Expanoids. The Lady Be Good Club was an underground science club in disguise as a bar and cabaret club.
When the boys from the Dwarf found themselves stranded on Twentica, they were given directions to the Lady Be Good Club by a dying man, and told to find Harmony de Gauthier.
Upon arriving at the club, Big Bang Beryl appeared and asked the Dwarfers if they wanted any company. When they asked for Harmony, Big Bang Beryl made the introduction.
Harmony thought that the Dwarfers were there "to do quantum mechanics", but when Arnold Rimmer said that they were there for something else (meaning the Casket of Cronus), Harmony said that she "didn't do the big bang" and pointed them in the direction of Big Bang Beryl.
Beryl gave a cheeky smile and wave to the Cat, who replied in turn. ("Twentica", Series XI)
