at least 2028, and the airline will be the club's shirt sponsor until at least 2024. From the start of the 2010–11 season on, the stands of the stadium have been officially known as North Bank, East Stand, West Stand and Clock end. The capacity of the Emirates now stands at 60,704. Arsenal's players train at the Shenley Training Centre in Hertfordshire, a purpose-built facility which opened in 1999. Before that the club used facilities on a nearby site owned by the University College of London Students' Union. Until 1961 they had trained at Highbury. Arsenal's Academy under-18 teams play their home matches at Shenley, while the reserves play their games at Meadow Park, which is also the home of Boreham Wood F.C. Both the Academy under-18 & the reserves occasionally play their big games at the Emirates in front of a crowd reduced to only the lower west stand. Supporters and rivalries Arsenal's fanbase are referred to as "Gooners" – the name derived from the club's nickname "The Gunners". Virtually all home matches sell out; in 2007–08 Arsenal had the second-highest average League attendance for an English club (60,070, which was 99.5% of available capacity), and, as of 2015, the third-highest all-time average attendance. Arsenal have the seventh highest average attendance of European football clubs only behind Borussia Dortmund, FC Barcelona, Manchester United, Real Madrid, Bayern Munich, and Schalke. The club's location, adjoining wealthy areas such as Canonbury and Barnsbury, mixed areas such as Islington, Holloway, Highbury, and the adjacent London Borough of Camden, and largely working-class areas such as Finsbury Park and Stoke Newington, has meant that Arsenal's supporters have come from a variety of social classes. Much of the Afro-Caribbean support comes from the neighbouring London Borough of Hackney and a large portion of the South Asian Arsenal supporters commute to the stadium from Wembley Park, North West of the capital. There was also traditionally a large Irish community that followed Arsenal, with the nearby Archway area having a particularly large community, but Irish migration to North London is much lower than in the 1960s or 1970s. Like all major English football clubs, Arsenal have a number of domestic supporters' clubs, including the Arsenal Football Supporters' Club, which works closely with the club, and the Arsenal Independent Supporters' Association, which maintains a more independent line. The Arsenal Supporters' Trust promotes greater participation in ownership of the club