UK inflation is now predicted to reach 3.5% in 2025, according to the Organization for Economic Co-operation and Development (OECD).
The OECD's interim economic outlook, which increased its previous forecast for the UK, also cited "mounting food price pressures" as a driver of inflation in Britain.
And campaigners have highlighted how reducing agri-food trade barriers with the EU will help lower supermarket prices.
Tom Brufatto, director of policy and research at Best for Britain, said:
“British families, workers and consumers are still facing an endless cost of living crisis, with Brexit increasing already rising supermarket prices even further, and continuing to harm the UK economy.
“Reducing trade barriers with the EU on agri-food products will help lower prices, and ministers must work with European partners to deliver this, following the promises of the UK-EU reset.”