Tries from Seb Stegmann, Hugo Ellis, Luke Eves, Matt Cox, Nathan Catt, Mark Odejobi and Noah Cato set England on the way to victory, with Leicester Tigers scrum-half Youngs used from the replacements bench during the second half.
In his first year at this age-group, Youngs started the opening games of the Championship and was used from the bench in the remaining fixtures.
England U20: Noah Cato (Saracens); Seb Stegmann (Harlequins), Luke Eves (Bristol), Alex Goode (Saracens), Mark Odejobi (London Wasps); Adam Greendale (Leeds Carnegie), Joe Simpson (London Wasps); Nathan Catt (Bath), Joe Gray (Northampton), Alex Corbisiero (London Irish), Graham Kitchener (Worcester), Scott Hobson (Cornish Pirates), Jon Fisher (London Irish), Matt Cox (Worcester), Hugo Ellis (London Wasps, captain)
Replacements: Scott Freer (Leeds Carnegie) for Gray 68, Billy Moss (Bath) for Corbisiero 68, James Cannon (Northampton) for Kitchener 53, Andy Saull (Saracens) for Ellis 41, Ben Youngs (Leicester Tigers) for Simpson 68, Greg King (Worcester) for Saull 71, Dan Norton (Gloucester) for Stegmann 70
Ireland U20: David Kearney (Leinster); Sean Scanlon (Munster), Eoin OMalley (Leinster), Conor Cleary (Leinster), Chris Cochrane (Ulster); Ian Madigan (Leinster), David Moore (Leinster); Paul Karayiannis (Ulster), Jason Harris-Wright (Leinster), Ben Barclay (Leinster), David Nolan (Connacht), Eoin Sheriff (Leinster), Kieran Essex (Munster), Paul Ryan (Leinster, captain), Patrick Mallon.
Replacements: Stephen Douglas (Ulster) for Harris-Wright 65, Stephen Archer (Munster) for Barclay 65, Trevor Conneely (Connacht) for Essex 46, Ian Porter (Ulster) for Moore 47, Martin Dufficy (Leinster) for Madigan 47, Eamonn Sheridan (Leinster) for Cochrane 73.