DD is 11 and 5ft 6. I've always bought school uniform from M&S as they do an extra long length in skirts and trousers but they've been out of stock for ages. I have a stock alert on her size but have given up waiting. Where else can I get slim leg grey trousers from? She has a 63cm waist and 79cm inside leg. Has anyone found any school uniform suppliers that cater for tall, slim children?