Vunipola is one of 12 players selected from the Premiership Rugby finalists, Leicester Tigers and Saracens.
Fraser Dingwall, Tommy Freeman, Guy Porter, Patrick Schickerling, Jack van Poortvliet and Jack Walker, along with Henry Arundell and Will Joseph who are named as apprentice players, are the eight uncapped players picked by England coach Eddie Jones.
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Of the 36-player squad, 10 were in England’s squad when it last toured Australia in 2016.
“Though we have nine players unavailable due to injury, we have picked a very strong squad capable of winning the series. This squad is a real mix of young, talented players and some very experienced, senior players and we’re looking forward to bring (sic) the group together,” Jones said in a statement.
“This tour will be a great experience for the group and a crucial part of the team’s work towards the Rugby World Cup in 2023. We will continue to develop the base of the squad and how we want to play.
“We’ve put a lot of work into preparation for the tour over the past few weeks, but now the hard work really begins when we finally get the squad on the plane and to Australia.”
FULL ENGLAND RUGBY SQUAD
Ollie Chessum, Luke Cowan-Dickie, Tom Curry, Charlie Ewels, Ellis Genge, Jamie George, Joe Heyes, Jonny Hill, Nick Isiekwe, Maro Itoje, Courtney Lawes, Lewis Ludlam, Bevan Rodd, Patrick Schickerling, Will Stuart, Sam Underhill, Billy Vunipola, Mako Vunipola, Jack Walker, Jack Willis, Henry Arundell, Danny Care, Joe Cokanasiga, Fraser Dingwall, Owen Farrell, Tommy Freeman, George Furbank, Will Joseph, Joe Marchant, Jonny May, Jack Nowell, Guy Porter, Harry Randall, Jack van Poortvliet, Marcus Smith, Freddie Steward