Ineos will explore how to expand a rebuilt Old Trafford into a 90,000-seat stadium if Sir Jim Ratcliffe is successful with his offer to buy a stake in Manchester United. The petrochemicals billionaire is hoping to hear on Thursday that the United board has approved his offer for 25 per cent of A and B shares for up to £1.3 billion, with Ineos taking over the football side of the business from the Glazer family as part of the deal. Ratcliffe’s offer, which is set to break months of deadlock in talks with the Glazers, is expected to be the first phase of what would become a full takeover. If the deal is approved this week, Ineos will hope that significant changes in performance structure