Charlie Atkinson, Biyi Alo, Freddie Clarke, Sam Jeffries and Patrick Schickerling have been called up for the first time.
Wing Jonny May is back in the fold after recovering from a knee injury, while Luke Cowan-Dickie (knee) and Anthony Watson (calf) will also be in camp undertaking rehabilitation work.
Players who will feature in Premiership semi-finals this weekend will not report for international duty.
England faces the Barbarians at Twickenham a week on Sunday (AEST) before a three-match series against the Wallabies, starting in Perth on 2 July.
Red Rose head coach Jones said: "With a number of players unavailable because of the Premiership semi-finals, we've got the opportunity to call up some new players.
"It's a great opportunity to learn about them and see what potential they have to play a part in the Australia tour.
"We look forward to continuing the good work from our last camp in developing this team on and off the pitch.
England training squad:
Forwards: Biyi Alo, Alfie Barbeary, Jamie Blamire, Callum Chick, Freddie Clarke, Tom Curry, Trevor Davison, Charlie Ewels, Will Goodrick-Clarke, Jonny Hill, Ted Hill, Sam Jeffries, George McGuigan, Tom Pearson, Bevan Rodd, Patrick Schickerling, Jack Singleton, Will Stuart, Sam Underhill, Jack Willis.
Backs: Henry Arundell, Charlie Atkinson, Mark Atkinson, Orlando Bailey, Joe Cokanasiga, Ollie Hassell-Collins, Will Joseph, Jonny May, Jack Nowell, Paolo Odogwu, Max Ojomoh, Tom Parton, Adam Radwan, Harry Randall, Dan Robson.