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
Supporters' groups "barras" and "porras" are used. In Europe, there are primarily three types of groups: official supporter groups, ultras, and hooligan firms. Official supporter groups primary function is to liaise with the club board and protects supporter interest as well as have a say in the running of the clubs, and they usually represent all types of supporters of all ages ranging from fanatical supporters, to disabled supporters, to supporters who rarely frequent games, however they are still an independent body. The oldest of which is Torcida founded in 1950 as supporters of Hajduk Split from Croatia. Ultras groups are independent