Smith, son of former England international Simon Smith, led the way with centres Jonny May (Gloucester) and Tom Catterick (Newcastle Falcons) both crossing twice.

Quins lock Charlie Matthews and Wasps hooker Arthur Ellis both touched down and Saracens fly-half Jake Sharp kicked eight of his nine conversions.

But despite recovering from an early Dave Riley score to win comfortably, head coach Mark Mapletoft was refusing to get carried away.

“We know strength in depth is the key to being competitive in the 6 Nations and in the Junior World Championship,” said Mapletoft.

“You’re always a bit apprehensive and I didn’t know how we’d go but I’m really pleased with the performance.

“Defensively after we’d conceded an early score we looked composed when we could have been rattled and nine tries was a good return.

“We still lack a bit of a cutting edge, making breaks and the last pass going to ground, but that’s all part of the learning process and the development of these young athletes.

“Smithy took his chances well but it’s hard to pick out any one individual. All 25 guys involved got on and all 25 put their hands up for a place in the first game against Wales.”

England U20: Jonathan Joseph (London Irish); Will Hurrell (Leicester Tigers), Jonny May (Gloucester Rugby), Tom Catterick (Newcastle Falcons), Sam Smith (Harlequins); Jake Sharp (Saracens), Sam Harrison (Leicester Tigers); Joe Marler (Harlequins), Jamie George (Saracens), Shaun Knight (Gloucester Rugby), Calum Green (Leicester Tigers), Danny Wright (Gloucester
Rugby), Will Welch (Newcastle Falcons), Jacob Rowan (Leeds Carnegie), Alex Gray (Newcastle Falcons).
Replacements (all used): Arthur Ellis (London Wasps), Lee Imiolek (Sale Sharks), Mako Vunipola (Bristol Rugby), Kieran Brookes (Newcastle Falcons), Charlie Matthews (Harlequins), Peter Elder (London Wasps), Jackson Wray (Saracens), Sam Stuart (Harlequins), Owen Farrell (Saracens), Christian Wade (London Wasps).

England scorers: Tries: Smith 3, May 2, Catterick 2, Matthews, Ellis.
Conversions: Sharp 8.