The Mail got the inside track on the BBC's Whistleblower programme - a fly on the wall documentary aired this week that exposed some pretty nasty goings on inside some of the UK's supermarkets and food suppliers. Undercover reporters who worked at Tesco and Sainsbury's for a four-month period told the paper that staff had tampered with use-by dates, flouted health and safety legislation and broke rules on cross-contamination of food.

The Mirror went to town on products that are not suitable for vegetarians following Masterfoods' u-turn on its decision to use animal products in its confectionery. The papers listed products such as Guinness, Campari, Worcestershire sauce, liquorice allsorts and wine gums - all of which contained ingredients that were not suitable for vegetarians, it said.

English winemakers boosted their credibility this week by collecting a record haul of medals at the world's biggest blind tasting competition, according to The Independent. England was awarded 21 medals, compared with 16 in 2006 and 10 in 2005. One gold medal wine was made only 25 miles from London.

Sainsbury's has made its first major property letting deal since pledging to exploit the value of its freehold property. The Daily Telegraph reported that it will sublet one third of its superstore in Merton, south London, to rival Marks & Spencer. Further deals with M&S in half a dozen similar sized Sainsbury's stores could be on the cards, it added.

Wal-Mart has given the go-ahead for Asda to open 300 homeware stores in the UK, according to an interview with its chief Andy Bond in the Observer. Bond said Asda would open "significantly" more than 30 supermarkets over the next three years and also expand its internet arm. He added that he would beat the £3.5bn sales growth target set by Sainsbury's boss Justin King.