The UK economy recorded no growth in April, according to the Office for National Statistics.
Gross domestic product (GDP) was flat during the month, following growth of 0.4% in March, the ONS said.
The figures present a headache for Prime Minister Rishi Sunak, who has pegged much of his General Election campaign on a recent record of economic improvement under his Conservative government.
Economists had predicted that GDP would be flat in April, held down by weaker-than-usual retail sales over the Easter period.
It comes after the economy grew by an estimated 0.6% in the first quarter of 2024, pulling the UK out of a small recession at the end of last year.