Leicester Tigers flanker Will Evans has been ruled out of the 2017 World Rugby U20 Championship in Georgia due to illness.
Harlequins back-row Dino Lamb will replace Evans in England’s 28-man squad, who gathered in Guildford last week for a pre-tournament training camp.
England U20 head coach Ian Vass said: “It’s a shame to lose Will at this early stage however this is a fantastic opportunity for Dino. We are pleased with how the training camp went last week and the players are hugely excited by what is ahead.”
Vass, Louis Deacon and Tom Williams continue as England’s coaching team, having joined the management as part of a new agreement with Premiership Rugby in which club coaches lead and develop the U20s while gaining experience in an international environment.
Playing all of their Pool A matches in the Avchala Stadium, England will open their campaign against Samoa on Wednesday 31 May.
England will face familiar faces in their second fixture when they come up against Wales on Sunday 4 June. The two sides recently met in the Six Nations, with England coming out 37-21 winners.
Australia, who were in England’s pool last year, are the opposition for their final pool game on Thursday 8 June.
All of the group stage matches will be streamed live on http://www.worldrugby.org/ with highlights shown on ITV4 on Wednesday 31 May, Sunday 4 June and Thursday 8 June. The semi-finals and final will be shown live on ITV4.
Updated England U20 Squad:
Ralph Adams-Hale (Saracens)
Josh Bayliss (Bath Rugby)
Jamie Blamire (Newcastle Falcons)
Josh Caulfield (Exeter Chiefs)
Justin Clegg (Worcester Warriors)
Max Davies (Newcastle Falcons)
Ollie Dawe (Bristol Rugby)
Ben Earl (Saracens)
Ciaran Knight (Gloucester Rugby)
Dino Lamb (Harlequins)
Zach Mercer (Bath Rugby)
Joe Mullis (Gloucester Rugby)
Jack Nay (Saracens)
Alex Seville (Gloucester Rugby)
Marcus Street (Exeter Chiefs)
Henry Walker (Gloucester Rugby)
Sam Aspland-Robinson (Harlequins)
Theo Brophy Clews (London Irish)
Will Butler (Worcester Warriors)
Ali Crossdale (Saracens)
Gabriel Ibitoye (Harlequins)
Max Malins (Saracens)
Alex Mitchell (Northampton Saints)
Dominic Morris (Saracens)
Tom Parton (London Irish)
Harry Randall (Gloucester Rugby)
Jacob Umaga (Wasps)
Max Wright (Yorkshire Carnegie)
England World Rugby U20 Championship fixtures:
England v Samoa: Wednesday 31 May – Avchala Stadium (10am KO BST)
England v Wales: Sunday 4 June – Avchala Stadium (5pm KO BST)
England v Australia: Thursday 8 June – Avchala Stadium (5pm KO BST)
Semi-finals and knock-out matches (Tuesday 13 June) Details TBC
Final and knock-out matches (Sunday 18 June) Details TBC