The stadium design was released on 7 November 2007. As a "distinctive 80,000 seat stadium, it will be the attraction for the 2012 Games, hosting the opening and closing ceremonial and the athletics actions, converting down to a 25,000 seat permanent stadium after the Games, when it will become a new home for athletics, combined with other sporting, community and educational uses", LOCOG.
As of June 2009, the stadium's track-and-field arena has been dig out of the soft clay found on the site, around where possible seating or 25k, using concrete "rakers". The natural slope of the land is incorporated into the design, with warm-up and changing areas being dug into a semi-basement position at the lower end. A demountable lightweight steel and concrete upper tier has been built up from this “bowl” to accommodate a further 55,000 viewers, and is nearing conclusion
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