Not many haircuts have seen as many changes in interpretation as the undercut, which has gone from a military cut and style synonymous with Nazi officials to fashionable women, hipster boys and now, closing the circle, the far right again. The cut was originally popularised by street gangs in the early 20th century (including yes, the original Peaky Blinders) as it was practical and prevented hair being grabbed in fights. It went on to become a mainstream men’s barbershop trend and a military cut around the time of the First World War thanks to its clean, neat finish and ease to achieve with basic kit. The undercut became popular again in the 90s when worn with curtains for the ultimate boy band style; technically, the cut removes weight from the hair to allow it to sit better – perfect for swooshy curtains. Worn by women, it provides edgy contrast whether paired with a high top or as a hidden panel under longer styles.