Tesco has raised the price of more than 1,000 items in two weeks, including household staples such as pasta, rice and cheese.

The supermarket, according to internal documents uncovered by the Press Association, has raised the price of many own-brand products as well as big brands.

According to the files, during the first two weeks of July, prices were put up by an average of 11 per cent.

A five-pack of bananas has gone up 11 per cent from 90p to £1; own brand farfalle, macaroni and linguine pasta have all risen 30 per cent from 50p a pack to 65p; seedless strawberry jam is up 23 per cent to 92p and iceberg lettuces are up 17 per cent at 60p each.

The highest price rise was for Merchant Gourmet puy lentils, up from £1.42 to £3.60 a pack - a rise of 152 per cent.

The branded items with the biggest rises include Cathedral City Mild Cheddar up 57 per cent to £5.50 for 550 grams; 20-packs of Carlsberg lager up 33 per cent from £9 to £12; Ferrero Rocher chocolates up from £1 to £1.25 and a 5kg bag of Salaam basmati rice now £9 versus £7 previously - a rise of 29 per cent.