Cowan-Dickie is a member of the Exeter Chiefs academy
Two Cornish youngsters have been named in the England Under-18 squad for the forthcoming season.
Luke Cowan-Dickie and Jack Nowell, who are pupils at Truro College, are both named in the 26-man squad.
England Under-18s begin their international programme against Ireland on 30 December.
Devon have three representatives in the squad, with Ivybridge College's Jack Arnott and Sam Hill, and Plymouth College's Henry Slade all selected.
England head coach John Fletcher said: "The evidence from our summer camps with under-16 and under-18 players is that the technical and tactical ability continues to improve.
"That's to the credit of regional academies, clubs and schools who do a better job each year.
"Our overall philosophy is to have as many attacking options as we can so that when these young players move on with the under-20s, Saxons and senior England teams, they have a bigger toolkit to use and go out there and win games."
England Under-18 squad:
Forwards: D Barrow (Prince Henry's GS), J Clifford (RGS Guildford), L Cowan-Dickie (Truro College), M Hankin (Haileybury College), D Herriott (Moulton College), A Hepburn (Henley College), G Jones (Eton College), T Jubb (Oaklands College), N Morris (Sedbergh), T Price (Wyggeston), G Sandford (St Paul's Catholic College), K Sinckler (Epsom College), D Sisi (St Paul's Catholic College), T Smallbone (Harrow), S Spurling (Harrow)
Backs: J Arnott (Ivybridge College), A Day (St Joseph's College), S Hill (Ivybridge College), W Hooley (The Leys), M Jennings (Myerscough College), J Lightfoot-Brown (St Paul's Catholic College), J Nowell (Truro College), H Slade (Plymouth College), M Tamiau (Twyford CofE HS), A Watson (St George's College), M Webber (Manchester GS)