Four months ago, this is how the Olympic Park looked as it welcomed tens of thousands of visitors for the opening ceremony of the Games on 27 July. The venue is now a shell of its former self as it was handed over by London 2012 organisers to those charged with securing the site's economic future.

The conditions were damp and dreary as the London Legacy Development Corporation (LLDC) was handed responsibility for the Park which is undergoing a £292m transformation. Workmen moved back on to the site soon after the last firework popped at the closing ceremony of the London 2012 Paralympics in September.

The deconstruction programme has changed the face of the Park with many arenas being dismantled. At the Aquatics Centre, one of the venues which will remain, all 17,500 seats have been removed as workers prepare to replace temporary stands on either side of the building with glass windows.

To mark the handover on Tuesday, industrial abseiler Vicki Tough took down the last strip of the shell of the seating used on the east wing of the Zaha Hadid-designed Aquatics Centre.

The next phase of work at the Aquatics Centre will see it fitted out as a public leisure centre. The whole Park is due to open by spring 2014 but LLDC chief executive Dennis Hone has said the amount of work needed to convert the Olympic Stadium means it could delay this until August 2016.

Since workers moved back on to the site in September, power cables, generators and other materials and utilities including 165,000 sq m of tents, 140km (87 miles) of fencing, 240km (150 miles) of barriers and 100,000 sq m of temporary sports surfaces have been removed.

Visitors to the Olympic Park enjoyed wildflower meadows and parklands that were timed to be in full bloom across the site during the Games. Some 4,300 semi-mature trees and 100,000 new shrubs will now be planted to help form the landscape of the North Park.