The English Football League One is the second-highest division of the English Football League and the third tier overall in the English football league system, after the Premier League and the EFL Championship. It is contested by 24 professional clubs. Introduced in the 2004–05 English football season as Football League One, it is a rebrand of the former Football League Second Division. Burton Albion currently hold the longest tenure in the division following relegation from the Championship at the end of the 2017–18 season. There are nine former Premier League clubs currently competing in this division: Barnsley (1997–98), Blackpool (2010–11), Bolton Wanderers (1995–96, 1997–98, and 2001–2012), Bradford City (1999–2001), Cardiff City (2013–14 and 2018–19), Huddersfield Town (2017–2019), Luton Town (2023–24), Reading (2006–2008 and 2012–13), and Wigan Athletic (2005–2013).