Bird's-eye views of 2012 Olympic construction projects shows progress

New aerial photographs showing the progress made in constructing sports arenas for the 2012 have been released by the Olympic Delivery Authority in London.

The cluster of venues identified as the "big five" consist of the Olympic Stadium, Aquatics Centre, Velodrome, the Olympic Village, and offices for the visiting media and press.

The Olympic Stadium has now reached its full height of 60m, while the roofs of both the Velodrome cycling arena and the Aquatics Centre are nearing completion.

A new bridge at one of the Olympic Park's nearby railway stations has also been put in place, after the previous one was removed to allow the upgrading of transport links.

Many Olympic events are to be housed in existing venues outside of the Olympic Park's designated area, such as the O2 Arena, Wembley Stadium, Earls Court, the All England Club in Wimbledon, and Regent's Park.