The centre of the Stadium has been cleared to allow work to begin on creating the correct ground conditions for the running track and the turf for the field events.
The manufacture of the venue’s black and white seats has also started in a factory in Luton and they will start to be fitted into the Stadium later this summer.
Olympic Delivery Authority Chairman John Armitt said: ‘The Olympic Stadium will be at the heart of the action in 2012 and its image will be beamed to billions of people across the world.
‘Only two years ago, the Stadium site was a flat piece of ground. A huge amount has been achieved since then with the venue now structurally complete and at its full height. Work is progressing on covering the roof and the first seats will be fitted this summer. The continuing progress means the Stadium is still on track to be completed a whole year before the London 2012 Games.’
A quarter of the Stadium’s cable-net roof has already been covered with a fabric material, which will provide the correct conditions for athletes on the field of play and cover two-thirds of spectators.
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