LONDON - Britain's economy grew more strongly than expected in the first three months of 2025, giving a boost to Chancellor of the Exchequer Rachel Reeves, but she faces a stiffer test ahead due to her tax hike on businesses and US President Donald Trump's trade wars.

Between January and March, gross domestic product grew by 0.7 percent, accelerating sharply from an increase of 0.1 percent in the last three months of 2024, the Office for National Statistics said.

That was above the 0.6 percent growth forecast in a Reuters poll of economists and which was also expected by the Bank of England.

In March alone, the economy grew unexpectedly, expanding by 0.2 percent from February. The Reuters poll had pointed to a flat reading of 0.0 percent.

Sterling edged up against the US dollar after the data was announced.

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"Today's growth figures show the strength and potential of the UK economy," Reeves said in a statement. "In the first three months of the year, the UK economy has grown faster than the US, Canada, France, Italy and Germany."

She and Prime Minister Keir Starmer are trying to kick-start Britain's sluggish economy via increased spending on infrastructure and other reforms that they hope will boost investment.

However, the BoE said last week it expected the growth jump in the January-to-March period would prove temporary with output likely to expand by 1 percent this year, speeding up only slightly to 1.5 percent growth in 2027.

Trump's trade tariffs are expected to slow the global economy while British businesses have said they will be hit by big rises in employment taxes ordered by Reeves and in the minimum wage, which both came into effect in April.

Suren Thiru, economics director at ICAEW, an accountancy body, said the first-quarter growth spurt was likely to prove temporary with some businesses rushing to meet orders before the US tariffs took effect.

"This robust quarterly reading is probably the pinnacle for economic growth this year, with activity? likely to slow sharply going forward as tax and tariff rises and global uncertainty bite," Thiru said.

So far, Britain's consumers have remained largely unfazed by worries about the outlook for the economy. Data published this week showed a rise in their spending over March and April.

The ONS said growth in the first three months of 2025 was largely driven by the services sector although production grew significantly too after a period of decline.

Business investment grew strongly, expanding by 5.9 percent from the last quarter of 2024, the biggest increase in two years.

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Real GDP per head - which gives a better sense of how economic growth is being felt by people - grew by 0.5 percent, following two consecutive quarterly falls, the ONS said.