Morrisons has totted up a full year of sales growth, with its “biggest ever” Halloween helping cement the supermarket's turnaround.

The grocery giant said like-for-like sales in the third quarter rose 1.6 per cent, with Halloween turnover up around 20 per cent.

The figures represent a fourth consecutive quarter of sales growth amid a turnaround plan under chief executive David Potts, who took the helm last year following the removal of former boss Dalton Philips.

Mr Potts said: “Our like-for-like sales have now been positive for a year, which is thanks to the hard work and dedication of the whole Morrisons team.

“There is a lot more we plan to do. We will keep investing in becoming more competitive and improving the shopping trip, and I am confident we will serve our customers even better during the important trading period ahead.”

Morrisons flagged that food prices continued to fall during the quarter, with deflation of 1 per cent.

All of the so-called big four supermarkets - Tesco, Asda, Sainsbury's and Morrisons - have been cutting prices in a bid to better compete with German discounters Aldi and Lidl, who have eroded their market share.

UK supermarkets ranked by value for money Show all 10 1 /10 UK supermarkets ranked by value for money UK supermarkets ranked by value for money 1. Waitrose Getty Images UK supermarkets ranked by value for money 2. Aldi Getty Images UK supermarkets ranked by value for money 3. Sainsbury's Getty Images UK supermarkets ranked by value for money 4. Marks & Spencer UK supermarkets ranked by value for money 5. Lidl Getty Images UK supermarkets ranked by value for money 6. The Co-op Getty Images UK supermarkets ranked by value for money 7. Morrisons Getty Images UK supermarkets ranked by value for money 8 = Asda Getty Images UK supermarkets ranked by value for money 8 = Tesco BRISTOL, ENGLAND - NOVEMBER 18: (EDITORS NOTE: This image was created using digital filters) The Tesco sign is displayed outside a branch of the supermarket on November 18, 2015 in Bristol, England. As the crucial Christmas retail period approaches, all the major supermarkets are becoming increasingly competitive to retain and increase their share of the market. (Photo by Matt Cardy/Getty Images) Getty UK supermarkets ranked by value for money 10. Iceland Getty Images

Total sales in the quarter were down 1.2 per cent because of supermarket closures and the sale of the M Local convenience store chain.

Last week, Morrisons hit the headlines after it jacked up the price of Marmite by 12.5 per cent, weeks after a public spat between Tesco and Unilever erupted over the love-it-or-hate-it spread.