Inflation has added the equivalent of seven extra shops to the average household's annual grocery bill as supermarkets saw their highest sales growth in five years, figures show.

Supermarket sales growth accelerated to 5 per cent over the three months to 18 June - the strongest increase since March 2012 and a stark contrast to the 0.2 per cent decline seen this time last year - despite the ongoing political and economic uncertainty, Kantar Worldpanel grocery market share data reveals.

The robust growth was “partly” helped by grocery inflation increasing to 3.2 per cent, adding £133 to the average household shopping bill.

Butter is almost 20 per cent more expensive than last year while farmed salmon supply issues contributed to a 14 per cent price rise across fresh and tinned fish.

However recent spates of hot weather saw sales of ice cream and cider increase by 12 per cent and 16 per cent respectively, even ahead of the recent heatwave.

Fraser McKevitt, head of retail and consumer insight at Kantar Worldpanel, said: “The market's robust performance this period is partly down to particularly weak sales growth last year and a continuing increase in like-for-like grocery inflation, which is now running at 3.2 per cent.

“At this rate, that's an extra £133 on the average household's annual shopping bill, or the equivalent of seven additional shopping trips a year.”

Tesco enjoyed its fastest sales increase since April 2012 at 3.5 per cent, attracting an extra 369,000 shoppers, although its market share is down 0.4 percentage points since June last year to 27.8 per cent.

Morrisons achieved the strongest sales of the big four grocers, up 3.7 per cent despite its market share slipping back by 0.2 percentage points to 10.6 per cent, while Sainsbury's inccreased sales by 3.1 per cent and Asda continued its recent recovery with sales up 2.2 per cent.

Lidl pipped Aldi to the title of the UK's fastest growing supermarket for the first time since March, with sales growth of 18.8 per cent just ahead of its rival's 18.7 per cent.

Both retailers continue to gain market share, holding 5 per cent and 6.9 per cent respectively.

The Co-op's full two years of continuous growth saw sales up 2.2 per cent, Iceland has now posted 15 periods of increasing sales and Waitrose had its best sales growth since March 2012, marginally ahead of the market at 5.3 per cent, although its share has remained flat at 5.2 per cent.

Meanwhile, figures from rival analysts Nielsen show shoppers spent 4 per cent more on groceries over the four weeks to June 17 than the same period a year ago.

Tesco had the biggest increase among the big four, at 4.2 per cent, while Iceland's 9 per cent rise was the biggest of anyone outside the discounters.

Rising temperatures saw sales of soft drinks rise 9.1 per cent, alcohol up 6.8 per cent and ice creams soaring 24 per cent, while gin saw a 35 per cent increase, partly due to Father's Day.

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Mike Watkins, Nielsen's UK head of retailer and business insight, said: “The early summer weather gave supermarkets a much-needed shot in the arm.

“All in all it's refreshing to have some good news around retailing. Looking ahead, a continuation in both the warm and dry weather and creeping inflation means growth should be maintained at around 3 per cent for at least the next few weeks.”