Contractor begins vertical construction of landmark designed by Anish Kapoor

Arcelor Mittal Orbit sculpture, Sir Robert McAlpine

Arcelor Mittal Orbit sculpture, Sir Robert McAlpine

Sir Robert McAlpine is about to start vertical construction on the £22.3m Arcelor Mittal Orbit sculpture being built as a landmark for the 2012 Olympic Games in London.

The Olympic Park Legacy Company this week launched a competition to find an operator to run the 114m-high tourist attraction, designed by Anish Kapoor, and raise the £2-4m needed