The first stage of inching the huge arch that will be the centrepiece of the new Wembley Stadium into place began on Friday.
The arch will not been in place for six weeks
The 2,000-tonne structure is being slowly lifted off the ground, but it will not be in its final position for another five or six weeks.
Designers say that when the 440ft tall arch is in place it will be able to be seen across London.
The raising of the arch was delayed in March after tests showed weak spots.
'Quality assurance checks'
Computer tests found welding faults and problems with the concrete foundations.
Multiplex Construction UK, the contractor for the Wembley Stadium project, said the defects were discovered during "quality assurance checks".
The stadium remains on target to open in 2006.
The 2006 FA Cup Final is set to be the first match played there when it opens.