Leyton also expressed an interest in ground sharing the stadium with West Ham, but West Ham were not keen on the idea, and in December 2012 West Ham was chosen as the permanent tenant of the Olympic Stadium. Orient chairman Barry Hearn voiced his complaints over West Ham United being given an anchor tenancy at the stadium. Orient claimed that the stadium was too close to their own, which they claimed would breach FA rules and by extension, move the club into bankruptcy. On 6 March, Barry Hearn stated that he would mount another legal challenge as he believed that the rules set out by the LLDC had not been followed. Hearn also said that he felt that Leyton Orient's proposed ground share had been ignored and not properly explored. Leyton's legal challenge was ended when a confidential agreement between Orient and the Premier League was reached. Among Orient's main rivals are Southend United, with whom they contest the A13 derby. The rivalry came about after a period of Southend being Orient's geographically closest league rivals between 1998 and 2005. Although they have not often played in the same division, they have met in the League Cup in 2011–12 season, Leyton Orient beating the Shrimpers after extra time on penalties. More recently, Southend beat Orient 3–2 on aggregate in the 2012–13 Football League Trophy Southern Area Final. Other local rivals include West Ham United, Millwall, Brentford, Dagenham & Redbridge and Barnet. To a lesser extent and from a little further afield, Brighton & Hove Albion and Cambridge United are also considered rivals. Historic rivals include neighbours Leyton and two other disbanded/merged clubs, Leytonstone and Walthamstow Avenue. The Dagenham & Redbridge rivalry continues the old rivalries with the latter two. Football League Second Division (2nd tier)  Football League Third Division / Third Division South (3rd tier)  Football League Fourth Division / League Two (4th tier)  National League (5th tier)  FA Trophy  Anglo-Scottish Cup  London Challenge Cup  Dubonnet Cup    The supporter fan-base is usually centred in East London. The Supporters club is the official supporters representative although there is a smaller group called "Leyton Orient Fans Trust". that are involved in fans rep meeting alongside the supporters club, The fans trust coordinated protests against the owner at the time between 2017 and 2019 at Blackpool F.C. (along with home fans who were also protesting their management), which included a protest down Leyton high road which was attended by a couple of hundred people.