Football stadiums remain unused for most of the year, so it makes sense for clubs to use them for other activities where possible, such as sporting events and music concerts, in order to boost match day income. For example, Old Trafford is used for the annual Rugby Super League Grand Final, while Arsenal hosted Arctic Monkeys at the Emirates and Tottenham staged the World Heavyweight showdown between Anthony Joshua and Oleksandr Usyk. In fact, Tottenham’s new stadium has been designed as a multi-use facility, leading to a 10-year deal with the NFL to stage American Football games, whereby Spurs apparently take all the catering and merchandising revenue. Three key stadium expansions are: Liverpool – third tier added to the Anfield Main Stand, adding 8,500 seats, increasing capacity to 53,000. Opened at start of 2016/17 season. Manchester City – third tier added to the South Stand, adding 7,000 seats, increasing capacity to 55,000. Opened at start of 2015/...