The latest grocery share figures from Kantar Worldpanel for the 12 weeks ending 19 July show supermarket sales edged up by 0.8%, with loyalty schemes and TV ads positively impacting retailers' share. Waitrose sales rose 3.0%, with Kantar crediting its ‘Pick Your Own Offers’ loyalty initiative for a market share increase to 5.0% -- up 0.1 percentage points compared with last year. Despite a fall in sales of 0.3%, Sainsbury’s gained a market share of 16.5% nudging Asda back into third place.