She had heard the stories about how Islamic State fighters could glide like ghosts into Kurdish militia bases during the dead of night, but nothing prepared her for the bedlam when it happened. It was 3.40am on 12 February when Isis attackers scrambled over the perimeter defences of the base north of Raqqa. Kimberley Taylor was convinced it would be overrun. Grabbing her Kalashnikov, she began firing at the shapes. Beyond the corner of the nearest building cowered an enemy fighter. Suddenly he rushed towards her. As their eyes met, he yanked the cord on his suicide belt.