Grocery price inflation has hit a record 14.7% to add a potential £682 to the annual cost of a basket amid warnings there is still no sign of a peak.
Sales of supermarket own-label products jumped again by 10.3% over the latest four weeks and the cheapest value ranges grew by 42% as shoppers sought to manage their budgets, according to Kantar.
Just over a quarter of households (27%) say they are struggling financially – double the figure recorded last November, the research firm said.