UK Prime Minister Keir Starmer announced his resignation on June 22, increasing political uncertainty in the country [1, 2, 3, 4]. His decision follows significant losses suffered by the Labour Party in the May 7 local elections, which intensified pressure on his leadership [2, 3, 4]. The pound sterling weakened against the US dollar, trading near its 2026 low at around $1.3181 amid the turmoil [1, 2, 3, 4].

Starmer’s departure comes after several days of deliberation between June 19 and 21, during which he faced mounting pressure following the election of Andy Burnham as an MP and Greater Manchester Mayor [2, 4]. Burnham is considered a likely successor but has not clarified his stance on fiscal policy, raising concerns among market participants [2, 3, 4].

Market analysts expressed nervousness over the potential impact of Burnham’s leadership on public finances. Steve Brice, Global CIO at Standard Chartered, said, “If Burnham thinks he can come in and spend his way to growth, I think the markets will have a different view of that” [2]. Likewise, Commonwealth Bank of Australia strategist Kristina Clifton noted, “Markets will be focused on Burnham’s views on fiscal policy and whether there will be any relaxation of the current fiscal rules. A loosening in fiscal rules would likely be poorly received by the UK bond market and weigh on the pound” [2].

Despite sterling’s fall, UK 10-year government bond yields held steady around 4.85% after Starmer’s resignation [1, 3]. Sterling’s decline since the May 7 elections totals about 2.5%, partly due to expectations that UK interest rate hikes will be more modest compared to the US [2, 4]. Analysts warn that any relaxation of fiscal rules could trigger further pressure on UK bonds and the currency [2, 4].

The political uncertainty following Starmer’s resignation marks a critical moment for the UK financial markets. Attention now turns to the next steps in selecting a new prime minister and clarifications on fiscal strategy. No official date for the appointment of Starmer’s successor has been announced.