The retail cost of red seedless grapes has remained largely stable this week following the rise of 11.8% seen in last week's report.

The only retailer to have increased the price of its 1kg punnet was Waitrose, which over the past seven days has boosted the cost from £3.49 to £3.99.

The price of McCain Home Fries also appears stable at £1.75 at the big four, although this price could be set to rise in the new year when the cost of potatoes is expected to leap due to a poor harvest and various issues with quality.

Meanwhile, tracking down supplies of American long grain rice has proved problematic this week, as can be seen in the availability section on the facing page.

Tesco and Asda were not stocking this product in light of the scare over illegal genetically modified rice, and had replaced it on the shelves with large quantities of basmati - which comes at generally higher price points.

The position of the top two cheapest supermarkets remained unchanged from last week, with Asda once again leading the way in terms of price.

Its basket of 33 items cost just £45.75 while Tesco was 16p dearer at £45.91.

Asda was also the cheapest supermarket for its 33-item non food basket in The Grocer 33's latest Non Food Report (see our report on page 22).

Morrisons managed to slip ahead of Sainsbury's this week and claim the third cheapest shopping basket of the six.

This was achieved by a number of cheaper prices for the fresh delicatessen items on our list such as own label Brussels pâté, which it was selling for 69p, compared with Sainsbury's price of 99p, and own label quiche lorraine, which could be bought at Morrisons for £1.59 and £1.65 at Sainsbury's.

Somerfield was once again the most expensive retailer on our list behind Waitrose whose basket cost £52.46.

Somerfield was carrying more expensive prices than Waitrose for 21 of the 33 items on our list.