By Amelia Ward Gemma Collins has urged the fashion industry to make “huge changes” after learning Victoria Beckham’s new Mango range only goes up to size 12. The former TOWIE star urged followers to embrace their bodies while showing off her slimmed-down figure on Instagram. Posing in a black, tie-front swimsuit, the TV personality looked stunning. But despite her recent weight loss, she still has trouble shopping on the high street, and has urged retailers to stock plus sizes in store – specifically naming 50-year-old Victoria’s new collection for Mango. Gemma wrote: “Whatever your BODY CONFI…