Britain's second supermarket group J Sainsbury revealed today [Wednesday] that it saw weaker-than-expected growth for its Q1 ended 22 June, despite extensive promotions in June to mark the World Cup football tournament. UK like-for-like sales, including petrol, were up 2.7% in the Q1, against predictions of more than 3%. The group's US grocery chain Shaw's also experienced tough trading conditions and slowdown in like-for-like growth.