Back To Class With Pretty Polly & Pretty Holly

About 10 years ago, U.K. hosiery maker Pretty Polly introduced a line of lingerie and bras. As for much of the Brand's history, they used subtly to get their marketing points across. Not. They also used TV presenter, model and actress Holly Willoughby



Now, as many head back to work or class, you can study the above ad for.. cultural significance of the late 1990's?
(Leave a comment if you find any beyond the obvious).