Two players from last year's squad - Leicester Tigers scrum half Ben Youngs and Northampton Saints lock Courtney Lawes - were capped at senior level this season.
Gloucester were represented this week by Freddie Burns, Shaun Knight, Jonny May and Jordi Pasqualin.
To view a selection of images from the training session on Thursday, click HERE.
England Under 20 squad
Forwards
Arthur Ellis (London Wasps)
Jamie George (Saracens)
Jamie Gibson (London Irish)
Alex Gray (Newcastle Falcons)
Calum Green (Leicester Tigers)
Lee Imiolek (Sale Sharks)
Shaun Knight (Gloucester Rugby)
George Kruis (Saracens)
Joe Marler (Harlequins)
Charlie Matthews (Harlequins)
Jacob Rowan (Leeds Carnegie)
Mako Vunipola (Bristol Rugby)
Will Welch (Newcastle Falcons)
Jackson Wray (Saracens)
Backs
Freddie Burns (Gloucester Rugby)
Tom Casson (Harlequins)
Tom Catterick (Newcastle Falcons)
Rory Clegg (Harlequins)
Charlie Davies (Stade Francais)
Andrew Forsyth (Leicester Tigers)
Sam Harrison (Leicester Tigers)
Tom Homer (London Irish)
Will Hurrell (Leicester Tigers)
Jonny May (Gloucester Rugby)
Sam Smith (Harlequins)
Christian Wade (London Wasps)
IRB Junior World Championship schedule
June 5: England v Argentina (Rosario 12pm BST)
June 9: England v Ireland (Rosario 10am)
June 13: England v France (Rosario 10am)
June 17: Match Day Four
June 21: Finals Day
