What is "cool britannia"

Cool Britannia was a period of increased pride in the culture of the United Kingdom throughout most of the 1990s, inspired by 1960s pop culture. The success of Britpop and musical acts such as the Spice Girls and Oasis led to a renewed feeling of optimism in the United Kingdom following the tumultuous years of the 1970s and 1980s. It is a pun on the title of the British patriotic song " Rule, Britannia!".