The dedication of WESTFIELD LONDON, in October 2008, spelled trouble for the 32-year-old BRENT CROSS CENTRE. The new Westfield property was less than 5 miles away and (with 1,614,600 lettable square feet) was nearly twice the size of the older shopping precinct.
Photo from Wikipedia / "Panhard"

In September 2011, an even larger Westfield property started trading to the public. WESTFIELD STRATFORD CITY, less than 10 miles distant, encompassed an astounding 1,883,900 lettable square feet.
Photo from Wikipedia / Harry Lawford