Prices at supermarkets increased 2% in the four weeks to Sept. 29, its data showed Tuesday. The fastest increases were in chilled drinks and chocolate confectionery, Kantar said, indicating that record high cocoa prices from poor harvests in West Africa are starting to feed through.

U.K. grocery inflation ticked up slightly after August’s fall, according to the latest report from research firm Kantar. Annual grocery inflation increased to 2% for the four weeks to Sept. 29, up from 1.

British shoppers faced increased pressure on their budgets last month after grocery price inflation edged higher, industry data showed on Tuesday. Market researcher Kantar said annual grocery price inflation was 2.

Despite the overall increase in prices last month, researchers said supermarkets had cut back the cost of some essentials as they battle to win over customers.

Grocery price inflation edges up as shoppers turn to promoted items - Analysis shows supermarket prices are 2% more expensive than a year ago, up from August’s 1.7%.