article_snippet: Here, Sportsmail looks at some of the players to have performed well at each age group.
article_snippet: Indeed, the teenager, who made Sam Allardyce's first-team squad for the Capital One Cup tie with Sheffield United earlier in the season, has been the subject of interest from Arsenal, Liverpool and Manchester United.
article_snippet: Capable of playing in central midfield as well as defence, the 17-year-old has become a regular in Neil Dewsnip's under 18 side this season.
article_snippet: Another member of the England team that triumphed at the Under 17 European Championships,
article_snippet: The 21-year-old has been important in Brentford's surprising push for Premier League promotion this season and made the transition to the international arena effortlessly, putting coach Aidy Boothroyd in the frame for a place in Gareth Southgate's under 21 squad for the summer's European Championships.
article_snippet: : Midfielder has been a part of Gareth Southgate's squad for some time and has been playing for Manchester City during this campaign on loan from Spurs.
article_snippet: A player who has experience with the senior team but seems content to gain experience with the under 21s for the time being.
article_snippet: A player who has experience with the senior team but seems content to gain experience with the under 21s for the time being figured in the win over the Czech Republic and looks set to be included in the squad for the Euros in the summer.
article_snippet: Still only 20, John Stones is a regular fixture in the Everton defence and manager Roberto Martinez has tipped A player who has experience with the senior team but seems content to gain experience with the under 21s for the time being for a bright future for both club and country.
article_snippet: Stones pictured in training ahead of England's under 21 game with the Czech Republic .
article_snippet: It has also been a breakthrough season for the 19-year-old at club level, with Ronald Koeman playing Ronald Koeman in 12 Saints matches this term.