Ocado and Lidl have experienced a surge in sales, leading to a boost in their market share, according to new data from Kantar.

In the 12 weeks to 1 September, Ocado was found to be the fastest-growing grocer for seventh consecutive month and delivered its quickest rate of growth since May 2021 with sales rising by 12.9%.

This put the online supermarket ahead of the total online market, which expanded by 4.4%, while its grocery market share increased by 0.2 percentage points to 1.8%.

Lidl also experienced a robust performance, with its market share rising to 8%, having won share every month since April 2021.

The figure was primarily driven by a higher footfall in August and bolstered through digital vouchers for bakery items, leading to the discounter’s sales being 9.1% higher than the same period a year ago.

Meanwhile, Asda market share now stands at 12.6%, down from 13.8% during the same period last year, while its sales dropped 5.6% year on year.

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Elsewhere, Tesco’s market share edged up 0.6 percentage points, with the retailer now taking 27.8% of sales, its highest stake since January 2022.

Sales at Waitrose increased by 4%, ahead of the wider market, and frozen-food specialist Iceland’s sales grew by 4.4%, keeping its market share level at 2.3%.

It comes as grocery price inflation fell to 1.7% over the last four weeks, however, Kantar head of retail and consumer insight Fraser McKevitt said “shoppers’ financial confidence hasn’t risen with it”.

“Memories of the last two years remain strong, with nearly 60% of shoppers still very or extremely concerned about rising grocery prices.

“This is their second biggest financial worry, only behind home energy bills.  Retailers have been doing their bit to help shoppers keep the cost of the weekly shop down, and the proportion of sales on promotion increased year-on-year for the sixteenth month in a row in August.

“More than half of all grocery trips include some kind of deal, and this proportion rises as the trolley gets bigger.”

McKevitt added that retailers and brands will be looking ahead to see how the Chancellor’s upcoming Autumn Budget could impact household incomings and outgoings.