Alex Sanderson’s side registered 12 tries in a comprehensive 78-8 victory over Italy at Temple Hill in Cork.
"You never expect such a big score-line but it was by no means an easy game and the boys came off battered and tired,” said head coach Sanderson. “All credit to Italy because they worked very hard but we ran some excellent lines and the score reflected that.
“This is a great start to the tournament. I couldn’t have hoped for much better. The lads have come off the pitch elated but tired too and now they know they must recharge their batteries for another two games in seven days.
“What was most pleasing was that the team kept to the structures and the principles we have been working hard at for the last seven months even when we were far ahead in the game.”
Scrum-half Harrison played the first hour of the fixture, while team-mates Forsyth and Will Hurrell came off the replacements bench after 35 and 49 minutes respectively.
England’s next match is against France this Saturday at the Cork Institute of Technology (kick-off 2.30pm).
England U18s Six Nations Festival fixtures
England U-18s vs Wales, March 2, Sixways Worcester, WON 25-15
England U-18s vs Italy, March 26, Temple Hill Cork, WON 78-8
England U-18s vs France, March 29, Cork Institute of Technology, (2.30pm)
England U-18s vs Scotland, April 1, Musgrave Park Cork, (2.30pm)
England U-18s (vs Italy U-18s)
Jack Wallace (RGS High Wycombe & London Wasps), Christian Wade (RGS High Wycombe & London Wasps), Tom Casson (Sedbergh & Sale Sharks) (Captain), Tom Homer (Milton Abbey & London Irish), Sam Smith (Cranleigh & Harlequins), Freddie Burns (Bath College & Bath Rugby), Sam Harrison (John Cleveland College & Leicester Tigers), Lee Imiolek (Myerscough College & Sale Sharks), David Blackwell (Hartpury College & Gloucester Rugby), James Currie (Millfield & Bath Rugby), Joe Quinn (St Wilfred's School & Leeds Carnegie, James Gaskell (Sandbach & Sale Sharks), Jacob Rowan (Bradford GS & Leeds Carnegie). Joe Barker (QEGS Wakefield & Leeds Carnegie), Rob Milligan (Rugby School & Northampton Saints)
Tom Catterick (for Wallace 35), Andy Forsyth (for Homer 35), Joe Trayfoot (for Rowan 35), Tom Holmes (for Gaskall 35), Gray (for Mulligann 35), Will Hurrell (for Cassons 50), Mako Vunipola (for Curry 55), Rory Clegg (for Burns 50), Jordi Pasqualin (for Harrison 60)