I bought about 4 for my son who started school in August (am in Scotland). I am about to put them in a charity bag. They have shrunk considerably. I've only ever washed them at 40 and don't own a tumble drier. Honestly, they are at least an inch shorter and they've shrunk all over. My George from Asda ones are faring very well as are his school trousers from there. Again I bought 2 pairs of M&S trousers and they've gone bobbly. I realise now that if I could be persuaded to buy from M&S again I need to buy at least a year or two bigger.
Anyone else had this problem? Be interesting to see which brands have been the best performers so far.