Teachers' Rugby League are supported by the NASUWT teaching union and the Rugby League Foundation. Super League is the top league for the game in Europe; eleven of the twelve teams are based in England. It is the only full-time professional rugby league competition operating in the Northern Hemisphere. The French team Paris Saint-Germain competed in the first Super League season but folded in 1999. French presence was re-established in 2006 when Catalans Dragons were admitted to Super League. In 2009, Super League added Celtic Crusaders from Wales, which renamed themselves Crusaders Rugby League after that season; that team effectively folded after the 2011 season. The winner of the league is awarded the League Leaders' Shield whilst the overall winner of Super League is determined by play-offs and a grand final. The winner of the Super League plays the winner of the Australian NRL competition in the World Club Challenge. Below Super League, there are the Championship and League 1. The Championship currently has 12 clubs and League 1 has 16. The 2015 season marked the return of a promotion and relegation system between Super League and the Championship; from 2009 through to 2014 promotion between the Championship and Super League had been on a licensed, or franchised, basis. Promotion and relegation between the leagues now known as the Championship and League 1 has long existed, including during the 2009–14 period. Following the 2014 season, the professional leagues underwent a major reorganisation. Super League and the Championship were both reduced from 14 clubs to 12, and League 1 was expanded from nine clubs to 14. The season structures of both Super League and the Championship were radically changed, and that of League 1 was more modestly changed. Wales became represented in the Championships starting in 2010 with the entry of South Wales Scorpions into League 1 and North Wales Crusaders in 2012. Toulouse Olympique of France played in the Championship in the past, and returned to the British league system in 2016, initially playing in League 1 and now in the Championship. The Toronto Wolfpack from Canada joined League 1 in 2017 and won the title in its inaugural season, thereby earning promotion to the Championship for 2018. All other clubs in both divisions are based in England, and of these, only London Broncos of the Championship and Newcastle Thunder, London Skolars, Gloucestershire All Golds, Hemel Stags, Coventry Bears and Oxford Rugby League of League 1 are based outside the heartlands. The Rugby League Challenge Cup remains as a knock-out competition, though entry has now been expanded to make it a pan-European tournament bringing in teams from France, Canada and the rest of the UK; Russian teams have previously featured.