Weddings tend to be formulaic. Vows. Champagne. Dancing. But, recently, one crucial element is becoming harder to predict: the dress. Instead of choosing traditional white, many brides are opting for something with a bit more of an impact. The anti-trad bridal dress is on the rise. Searches on Pinterest are up 240% for “unique wedding dresses”, while blush pink wedding dresses are up 60% and black 50%. On Wednesday, the fashion designer Ashish Gupta, whose dazzling sequined pieces are loved by fans including Beyoncé and Rihanna, launched his first bridal range. Instead of trad white gowns, you’ll find a sheer…