field. On 17 May 2010, West Ham and Newham London Borough Council submitted a formal plan to the Olympic Park Legacy Company for the use of the Olympic Stadium following the 2012 Summer Olympics. The proposal was for a stadium with a capacity of 60,000 which would retain a competition athletics track. The proposal was welcomed by the chairman of UK athletics, Ed Warner, who said, "I think it will feel great as a football stadium and I speak as a football fan as well the chairman of UK Athletics. I think you'd find West Ham would cover the track in the winter season so it wouldn't look like you had a track between you and the pitch." On 30 September 2010, the club formally submitted its bid for the Olympic Stadium with a presentation at 10 Downing Street, and on 8 October 2010 the world's largest live entertainment company, Live Nation, endorsed the club's Olympic Stadium plans. Three days after Live Nation's endorsement, UK Athletics confirmed its formal support for West Ham United and Newham Council in their joint bid to take over the Olympic Stadium in legacy mode. In November 2010, West Ham began a search for potential developers for "informal discussions" about what would happen to the ground if it were to win its bid to take over the Olympic Stadium after the 2012 Games. According to the club, the site could be vacated and open to redevelopment by summer 2014. On 11 February 2011, the Olympic Park Legacy Committee selected West Ham as the preferred club to move into the Olympic Stadium after the 2012 Games. The decision in favour of West Ham's bid was unanimous, although controversial as local Premier League rivals Tottenham Hotspur had also been bidding for the venue. Hopes of moving to the stadium, however, were since placed under doubt following a legal challenge by Tottenham and Leyton Orient, with Leyton Orienta perennial (since 1980) tier 3 to tier 5 clubfearful that having West Ham playing less than a mile away from their Brisbane Road ground could steal support from the club and put them out of business. Both clubs' appeal for a judicial review, however, were rejected on 23 June 2011. On 3 March 2011, West Ham's proposed move to the Olympic Stadium was formally approved by the British government and Mayor of London Boris Johnson. On 8 June 2011, it