OLYMPIC chiefs have opened bidding to operate the �22m ArcelorMittal Orbit visitor attraction to be built at the 2012 games park at Stratford.

Designed by Turner-prize winning artist Anish Kapoor, the 377ft spiralling structure will stand between the Olympic Stadium and Aquatics Centre.

Visitors will be able to travel to two observation floors at the top to experience panoramic views of the capital.

The successful bidder will be responsible for ticketing, marketing and events, hospitality and catering, the gift shop, reception and internal security during the 2012 Games.

Afterwards the operator would run it on behalf of the park’s legacy company, which expects one million people to visit the Orbit in its first year.

Legacy company Chief Executive Andrew Altman said it is hoped the spectacular Orbit would become a World visitor attraction, combing cutting edge design with stunning views of the London skyline.