Data from measurement firm Experian PLC show retail foot-traffic down in West London, sometimes substantially, for nearly every day of the games.

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Experian Automotive is a unit of Experian plc, one of the three main credit bureaus, with U.S. headquarters in Costa Mesa, Calif.

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Customer traffic at stores in East London, home to the Olympic Park, jumped 7% on Saturday compared with the week before, according to measurement firm Experian PLC.

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