Premium grocer Waitrose has reported its strongest ever sales week on its website Waitrose.com as shoppers stayed in to avoid the wet January weather.

Sales were up 120 per cent year-on-year (YOY) as its January promotion of a free bottle of Champagne with a first order tempted shoppers to order online.

Sporting events such as the Superbowl and Six Nations Championship caused a sales jump in crisps, snacks and pizzas while popcorn sales surged 76 per cent.

Rob Collins, Retail Director of Waitrose said it had been an “excellent week of trading” as sales rose 7.1 per cent compared to last year.

The supermarket, who holds a licensing agreement with Dubai grocer Spinneys, reported that its international business surged 28 per cent YOY.

Meanwhile partner company John Lewis reported a “solid week” of trading last week as home sales rose 4.6 per cent.

Simon Russell Director, Retail Operations Development, John Lewis said its ‘at home‘ branches had a “cracking week” and had continued to “mature steadily.”

He added: “It was great to see Textiles, Carpets and Lighting grow, too, as customers start to focus on their houses, while the later fall of Easter is having a small impact on seasonal gift sales.”