Chancellor Rachel Reeves has warned that “now is not the time” to risk instability amid a possible leadership challenge against Prime Minister Sir Keir Starmer . Her comments came after new figures showed that the economy unexpectedly grew in March . However, economists warned the pace of growth is set to stall throughout the year as the impact of the Iran war begins to show. Gross domestic product (GDP) increased by 0.3 per cent in March, the Office for National Statistics (ONS) said, showing a surprise uplift for the first full month after the start of the US-Israeli conflict with Iran. This helped the economy to grow by a higher-than-expected 0.6 per cent over the first quarter (January-March). This marked the strongest growth since the first quarter of 2025 and came in ahead of the 0.5 per cent rate that analysts had been expecting.…