it was a victory that became one of the defining moments of the second world war, and the nazis' first defeat. today marks 80 years since the start of the battle of britain. the spitfire was one of the iconic aircraft that took part, and now the raf have recognised for the first time that a 13—year—old girl played a vital role in the plane's design. sophie raworth reports. newsreel: way up in the sky, there are messerschmitt, junkers, heinkels or dorniers that are going to get the thrashing of their lives. july 1940 and nazi germany is beginning the first of many bombing raids in what became known as the battle of britain. but the raf‘s pilots managed to fight off the luftwaffe and defend these shores in their spitfires and hurricanes. it is the most famous plane from world war ii. it played a crucial role in the battle of britain. but what we didn't know until now was the role that a 13—year—old