McLaren has completed demolition and enabling works at the site and will now build the new 300,000 sq ft scheme which is due for completion in spring 2013.
The second phase of works include the construction of new steel framed retail unit shells within five main retail blocks centred around a new town square.
It will also involve renewed and upgraded external works, landscaping and associated highway works including the construction of a new roundabout.
Retail giants M&S (60,000 sq ft) and Next (19,500 sq ft) will anchor the scheme.