England must beat Australia to avoid early exit

By Nick Mulvenney CARDIFF (Reuters) - The Pool A maths are complicated and the permutations many, but hosts England go into Saturday's showdown with Australia knowing defeat means an exit from the Rugby World Cup in the opening round for the first time. A week after their shock 28-25 defeat to Wales stopped their campaign in its tracks, the hosts must rouse themselves for yet another high pressure encounter at Twickenham. "It is a huge game," England coach Stuart Lancaster said on Thursday.