We have a growing U15 (U16 next season) girls squad that have been training with us but have yet to have a match day experience with our club as the squad isn't quite big enough yet. We have an U17 squad (U18 next season) that has been playing league football this season and as we draw towards close we are being offered friendly matches. Can I include U15 players in an U17 friendly match if supported by player and parent?