“There she is!” says a woman entering the Mary Quant exhibit, pointing out a large black and white photo of the designer to her friend. Tucked behind the V&A’s costume collection, they’ve patiently queued for the moment they can enter and I feel the same excitement, anticipating a colourful run-through of her fashions between 1955 and 1975. Mary Quant is so iconic she needs no introduction. Her cropped Sassoon bob and Daisy logo have sunk into our consciousness to such an extent, it seems impossible that there was a time when the influence of her designs was not felt. The exhibition focuses on the golden years, the years of the…