Seven prime ministers in a decade. Once known for political stability, Britain has become a revolving door at the top of government.

On GZERO World, Ian Bremmer speaks with former UK cabinet minister Rory Stewart about what's behind the UK's political turmoil. Stewart explains how Brexit fractured the country's traditional party system, why both Conservatives and Labour have struggled to meet voters' expectations, and how rising public frustration has created opportunities for insurgent movements like Reform UK.

They also discuss whether New PM Andy Burnham represents a new political alternative, or whether Britain's deeper economic and structural challenges mean instability is here to stay.