Back-rower Wells started Friday’s 52-7 victory over Italy at Northampton’s Franklin’s Gardens, with wing Purdy used as a second-half replacement.
Defending Six Nations champions England never looked too troubled and wrapped up victory with tries from Jack Nowell (2), Sam Hill, Callum Braley, Tom Stephenson and two penalty tries, plus 17 points kicked by Henry Slade.
Tigers prop Tiziano Pasquali started the game in the Italian front row.
England Under-20
15 Ollie Devoto (Bath Rugby)
14 Ben Howard (Worcester Warriors)
13 Mark Jennings (Sale Sharks)
12 Sam Hill (Exeter Chiefs)
11 Jack Nowell (Exeter Chiefs)
10 Henry Slade (Exeter Chiefs)
9 Callum Braley (Bristol Rugby)
1 Danny Hobbs-Awoyemi (Northampton Saints)
2 Luke Cowan-Dickie (Exeter Chiefs)
3 Scott Wilson (Newcastle Falcons)
4 Elliott Stooke (Gloucester Rugby)
5 Dominic Barrow (Leeds Carnegie)
6 Harry Wells (Leicester Tigers)
7 David Sisi (London Irish)
8 Jack Clifford (Harlequins) (c)
Replacements
16 Nathan Morris (London Wasps) for Danny Hobbs-Awoyemi 50 mins
17 Alex Lundberg (London Wasps) for Luke Cowan-Dickie 70 mins
18 Danny Herriott (Northampton Saints) for Scott Wilson 60 mins
19 Tom Jubb (Saracens) for Harry Wells 53 mins
20 Gus Jones (London Wasps) for Gus Jones 75 mins
21 Alex Day (Northampton Saints) for Callum Braley 60 mins
22 Tom Stephenson (Northampton Saints) for Sam Hill 44 mins
23 Henry Purdy (Leicester Tigers) for Ben Howard 70 mins
