In the retailer chart this week the top two have swapped positions, so Asda tops the chart and Morrisons is in second place.
The shift continues Asda's increase in percentage points over the past couple of weeks.
Positions three to six remain unchanged, with just three percentage points separating them.
Walkers leaps up the brand chart from number five to take the top spot. The brand uses a combination of price promotions and multibuy offers sited on gondola ends and floor stacks to secure its position. Nestlé remains at number two and Princes also remains stable while Kellogg's, Coca-Cola, Persil and Mars all move up the chart.
There are two new entries this week with Heinz coming in at number eight and McVitie's just making the chart at number 10.
In the category chart soft drinks and alcoholic drinks continue at positions one and two respectively, although soft drinks has pulled further ahead.
Last week there was less than one percentage point separating the two categories, but this week the difference comes in at just under three percentage points.
Household and culinary have swapped places, with household moving up two to secure third place.
The own label category chart is relatively stable with three categories maintaining their positions from last week. These include frozen at number one, household and cakes & biscuits.
However frozen's lead has narrowed and there is now just two percentage points between frozen and household.
Alcoholic drinks has improved its position by one place.

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