By Samuel Meade Sir Jim Ratcliffe’s offer for 25 percent of Manchester United’s Class A shares traded on the New York Stock Exchange has been extended until midnight on Friday night. The offer was due to expire on Tuesday night but the bid, which was part of Ratcliffe’s deal to become the minority owner of the Premier League club will now be extended. On Christmas Eve it was announced that the Ineos chief had agreed to buy a 25 percent stake in the Manchester outfit. It was confirmed that Ratcliffe would offer to buy up to 25 per cent of all Class A shares at a price of 33 US dollars (£26) per…