sophie , 50 , wore a beret-style percher hat topped with large , dark plumes , while beatrice , 26 , the elder daughter of the duke of york and sarah ferguson , and sporting a slightly more subtly coloured hat embellished with a large rose , was autumn phillips , 36 , wife of the queen 's grandson peter phillips .
lady louise windsor , the countess ' 11-year-old daughter , made up the four royal ladies .