Ollie Chessum, Nic Dolly, Ellis Genge, Joe Heyes, Jack van Poortvliet and Freddie Steward have been included in an England Rugby training squad for a mini-camp next week with the national side.
The six Leicester Tigers will link up with international team-mates in Richmond from Sunday, May 22 - Tuesday, May 24 as preparations commence ahead of the summer fixture against The Barbarians and tour of Australia.
Genge, who was appointed vice-captain of the national side this season, is approaching 40 Test appearances.
Chessum and Dolly received their Test caps during the current season, while Heyes and Steward were capped last summer for the first time.
Scrum-half van Poortvliet is yet to make his senior Test debut after representing England at age-grade levels.
Alfie Barbeary (Wasps, uncapped)
Jamie Blamire (Newcastle Falcons, 6 caps)
Ollie Chessum (Leicester Tigers, 2 caps)
Tom Curry (Sale Sharks, 40 caps)
Nic Dolly (Leicester Tigers, 1 cap)
Alex Dombrandt (Harlequins, 9 caps)
Charlie Ewels (Bath Rugby, 30 caps)
Ellis Genge (Leicester Tigers, 36 caps)
Joe Heyes (Leicester Tigers, 2 caps)
Maro Itoje (Saracens, 56 caps)
Joe Launchbury (Wasps, 70 caps)
Courtney Lawes (Northampton Saints, 93 caps)
Lewis Ludlam (Northampton Saints, 11 caps)
George McGuigan (Newcastle Falcons, uncapped)
Tom Pearson (London Irish, uncapped)
Bevan Rodd (Sale Sharks, 2 caps)
Will Stuart (Bath Rugby, 20 caps)
Sam Underhill (Bath Rugby, 28 caps)
Mako Vunipola (Saracens, 67 caps)
Jack Willis (Wasps, 3 caps)
Henry Arundell (London Irish, uncapped)
Orlando Bailey (Bath Rugby, uncapped)
Joe Cokanasiga (Bath Rugby, 11 caps)
Fraser Dingwall (Northampton Saints, uncapped)
Owen Farrell (Saracens, 94 caps)
Tommy Freeman (Northampton Saints, uncapped)
George Furbank (Northampton Saints, 6 caps)
Will Joseph (London Irish, uncapped)
Louis Lynagh (Harlequins, uncapped)
Alex Mitchell (Northampton Saints, 1 cap)
Harry Randall (Bristol Bears, 6 caps)
Marcus Smith (Harlequins, 10 caps)
Freddie Steward (Leicester Tigers, 10 caps)
Manu Tuilagi (Sale Sharks, 46 caps)
Jack van Poortvliet (Leicester Tigers, uncapped)
Anthony Watson (Bath Rugby, 51 caps)