Tesco’s market share continued to slip in the three months to the end of March as Asda gained share.

Nielsen data for the 12 weeks to March 31 revealed that Tesco’s share stood at 28.6% in the period, against 28.8%the previous year.

Asda, Aldi, Lidl and Waitrose continue to outperform the market, as they have done consistently since the end of 2011.

Asda’s share rose from 15.8% to 16.3% aided by a strong Christmas and the integration of former Netto stores.

Sainsbury’s share rose to 15.9% from 15.8% on the same period last year while Morrisons’ share slipped marginally from 11.4% to 11.3%.

The Co-operative’s share fell to 7.3% from 7.4%. Aldi’s share rose from 1.7% to 2.2% buoyed a 33.1% increase in value while Lidl’s share rose 1.8% to 2%.

The market enjoyed an improvement in sales due to Mother’s Day and an earlier Easter.

Nielsen senior manager for retailer services Mike Watkins said: “Shoppers are still looking to get the best value for money for their weekly groceries but they were also prepared to indulge in affordable treats. 

“While shoppers were prepared to spend on events and seasonal treats early in March, they returned to economising towards the end.  The impact of falling disposable income and recent increases in fuel prices is reflected in the negative unit growths, which are continuing at similarly low level to those experienced last year.”

Nielsen warned that April’s figures are likely to be “tough” against strong Easter and Royal Wedding comparison last year.

Table: 12-Weekly % Share of grocery market spend by retailer and value sales % change

 % share, 12 weeks to 02 April% share, 12 weeks to 31 March% value change vs same 12 Weeks Year Ago