U.K. leader Rishi Sunak's hopes of turning around his beleaguered Conservative party's fortunes before a likely general election next year hinge on a British economic recovery, observers say.

Several resets have failed to claw back support from a resurgent Labour opposition, while the government's flagship plan to send illegal migrants to Rwanda is stalled by the courts.

"I think an improving economy is Sunak's only chance," said Chris Hopkins, politics director at polling firm Savanta.