Singapore Stocks Close Higher Led by STI Gains Amid Mixed Regional Markets UK Climate Watchdog Calls for Maximum Working Temperature Rules as Extreme Heat Preparedness Lags Xi Warns Trump Taiwan Misstep Could Severely Damage USChina Ties Iran Standoff Escalates Trump Rejects Counteroffer as Tehran Vows Never Bow Straining Energy Markets Mercury Systems MRCY Reports Strong Q1 2026 Revenue NA EPS Beats