LONDON (Reuters) -Britain's economy grew more strongly than expected in the first three months of 2025, giving a boost to finance minister Rachel Reeves, but she faces a stiffer test ahead due to her tax hike on businesses and Donald Trump's trade wars. Between January and March, gross domestic product grew by 0.7%, accelerating sharply from an increase of 0.1% in the last three months of 2024, the Office for National Statistics said. That was above the 0.6% growth forecast in a Reuters poll of economists and which was also expected by the Bank of England.