Premier League 2 is a competition that replaced the Under-21 Premier League from 2016/17, with a greater focus on technicality, physicality and intensity to bring players as close to first-team experience as possible.
The age limit for players has risen from Under-21 to Under-23.
The league will take on the same format of two tiers, Division 1 and Division 2, with 12 teams in each, and the factor of promotion and relegation.
The 24 clubs who compete each applied for 'Category One' status in the Elite Player Performance Plan (EPPP). There are 15 clubs from the Premier League and nine clubs from the Championship.
All players born after 1 January 1994 were eligible to play in the 2017/18 season. The format is as follows:
Other rules include:
Everton are the 2018/19 Premier League 2 Division 1 champions after beating second-placed Brighton & Hove Albion in their penultimate match of the season to clinch the Trophy.
Arsenal claimed the PL2 Division 1 title for the first time in 2017/18, while Blackburn Rovers went up as Division 2 champions.
Everton's first Division 1 crown came in 2016/17, while Swansea City won Division 2 by a margin of 11 points.
Manchester United were crowned PL2 champions in the competition's first season, when it replaced the Premier Reserve League in 2012/13, beating Tottenham Hotspur 3-2 in the final at Old Trafford.
Chelsea sealed the 2013/14 title with a 2-1 final victory over Man Utd at the same venue, before the Red Devils reclaimed the crown in 2014/15 and won it again in 2015/16.
Middlesbrough were the first Division 2 champions when promotion and relegation was introduced in 2014/15, before Derby County clinched the title in 2015/16.
Premier League 2 Division 1 winners
2015/16 Manchester United
2014/15 Manchester United
2012/13 Manchester United
Premier League Division 2 winners
2017/18 Blackburn Rovers
2016/17 Swansea City
2015/16 Derby County