'Total sales excluding fuel were down 2.1% compared to the same week last year as the country continued to experience mixed weather.
Ahead of the first episode of The Great British Bake Off, customers have been practising their own baking skills with sales of home baking products up by 9%.
Free from products also saw a sales increase of 15%, as shoppers continue to select gluten and dairy-free options.
Despite the recent gloomy weather, customers have been adding some colour to their homes and gardens with cut flowers and outside horticulture performing well.
Waitrose & Partners also announced last week that it would be the first UK supermarket to sell pullet eggs. These smaller sized eggs are produced by 'teenage' hens at around 18 weeks old - and are some of the best quality eggs that you can get for cooking.'
Martin George, Partner and Customer Director, Waitrose & Partners