The Conservatives say the government's pre-Budget "everyday fixes" package has already been wiped out by higher borrowing costs, taxes and inflation, the BBC reports.
The package removes import tariffs on more than 100 products, including marmalade, gherkins, baked beans and chocolate. The government estimates that, with tariff suspensions already in place, households could save up to £21 a year on their food shop. That estimate has not been independently checked.
The Conservatives have not put a figure on how far higher borrowing costs, taxes and inflation offset those savings. Their claim has not been independently checked either.
The Shadow Chancellor, Andrew Griffith, has already called the package an insult to families. The Chancellor, John Healey, delivers the Budget on Wednesday.