CHESHUNT, UK: The latest data from TNS Worldpanel shows UK supermarket titan Tesco extending the clear blue water between itself and main rivals Asda and J Sainsbury.

During the twelve weeks to August 13, Tesco increased its share of the UK retail market to 31.6% from 30.3% in the year-ago period.

Wal-Mart's local unit Asda with 16.6% share is now in second place, leading Sainsbury and a host of also-rans.

Data sourced from The Times Online (UK); additional content by WARC staff