Asda snatched the cheapest retailer title back from Morrisons as the price gap between them and the other retailers widened this week. Asda climbed to top spot with a £46.73 basket, £3.78 cheaper than the third most expensive retailer, Tesco, compared with a 74p gap between first and third place last week. Asda's basket boasted five of the cheapest items on the list.Whereas the rest of the big four kept courgettes at £1.98, Asda cut them by 49p to the lowest price of £1.49. Its grapes were £1.98 compared with the next cheapest price of £2.48 at Morrisons and Tesco, and its HP Sauce was 97p compared with Morrisons' £1.28. It also kept milk at a list-beating £1 for another week. Morrisons offered five of the cheapest items, although the savings were not as great as at Asda. It had the cheapest PG Tips, Ocean Spray and Lucozade, but other retailers' prices were no more than 2p pricier. The biggest saving in its £47.40 basket was on pineapple, 21p lower than last week at £1.48 and 50p less than at Asda. While Asda upped the price of its prawns by 69p to £2.69, Morrisons kept them at the lowest price of £2.49, but this wasn't enough to retain top spot. Morrisons also offered the priciest Country Life, up 12p to £1.05. Tesco remained in third place, with a £50.51 basket. Its price hikes outweighed its reductions. It added 89p to pineapple, 49p to olive oil, and 21p to PG Tips to make it the most expensive at £1.69. However, it cut the price of bagged potatoes 37p to 75p and celery was 18p cheaper at 50p - prices no other retailer beat. It also sold yoghurt for 29p less than at Asda. Sainsbury's didn't budge from fourth place and made no increases or reductions that affected this week's list. Its £51.25 basket did, however, contain the cheapest eggs at £1.45 and the most expensive yoghurt at £1.25. Waitrose slashed the price of Birds Eye cod by £1.08 to the lowest price of £3.21. Its £1.05 in-store loaf couldn't be beaten, but it remained the priciest retailer with a £54.08 total.