England have not played in a World Cup final since 2007 and Spencer will no doubt be brimming with excitement about coming in for the biggest game of not only his life but all of his new teammates.

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With Ben Youngs certain to start at No.9, Heinz will be parachuted onto the bench for just his fourth Test and first since England squared off against Scotland in March.

Spencer, a relative no-namer to Australian rugby fans, is set to go from playing for Saracens in the Premiership to lacing the boots in front of more than 70,000 fans in Yokohama on Saturday, provided he gets on the pitch.

Rugby World Cup rules state teams can only have 31 players in their squad and once someone is substituted out, they cannot return.

Jones said after the match the squad would take a couple of days rest before beginning their preparations on Tuesday. They will face the winner of South Africa and Wales, who were due to square off on Sunday night.

Playmaker Owen Farrell copped a bad cork during the match but continued through the pain and said afterwards he felt he would right to play in the final.