Bangladesh, Oct. 9 -- Prime Minister Keir Starmers ambitious trade mission to India this week marks a defining moment for the United Kingdoms fragile post-Brexit economy. With domestic growth stagnating, unemployment at its highest level in four years, and public frustration mounting over inflation and immigration, Starmer is betting heavily on foreign investment-particularly from India-to breathe new life into Britains struggling labor market and restore confidence in his governments economic strategy.

During his two-day visit to Mumbai, Starmer announced a package of investment deals worth £1.3 billion ($1.7 billion), secured from 64 Indian investors. The pledges are projected to create upwards of 7,000 new jobs in the UK, primari...