West London derby been in the Football League for a longer period of time than Brentford and had stronger rivalries with the likes of West Ham United and Tottenham Hotspur, whereas Brentford's main rivals are Fulham and QPR. Also Brentford developed a bigger sporting rivalry with Arsenal at the time as both clubs vied for the title of London's number one club. The only bad feeling between the clubs was soon after Chelsea's foundation and admission into the Football League in 1905, the other West London clubs, including Brentford, lost many supporters and potential supporters to the only professional Football League club in
Football Supporters' Federation the amalgamation of two separate bodies, the Football Supporters' Association (FSA) and the National Federation of Supporters' Clubs (NATFED). The FSF is a democratically structured organisation with a National Council made up of elected individuals, officers and divisional representatives. The FSF's current chair is Malcolm Clarke, who also sits as the supporters' representative on The Football Association (FA)'s Council. The Federation has regular meetings with the football authorities and the Department for Culture, Media and Sport, discussing a wide range of issues, many of them placed on the agenda by the FSF to take forward their policies or in response