Keynote Systems have named Marks & Spencer's mobile site best in the world, clocking at 4.8 seconds for load time with a 100 per cent success rate. This is remarkably higher than the average index of 9.5 seconds and 92.7 per cent success rate.

Tesco took third place with 5.8 seconds and 100 per cent success rate, followed by Next with 4.97 seconds and 98.8 per cent success. Second place went to a German retailer, Otto, but John Lewis were also in the top 10, clocking in at seventh.

Usablenet announced today that its platform powers three of the top four m-commerce sites in the world, according to Keynote Systems' Mobile Retail Index World Edition for the week ending 27 November.

The cloud monitoring authority tests for average response times, success rates, and download speed of the homepage in wireless networks around the globe.

"Keynote's report shows how UK retailers are leading the way in mobile commerce globally, and we're proud to partner with powerful brands committed in bringing best-in-class multichannel solutions to their customers," says Usablenet CEO, Nick Taylor.

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