@Adiloi Yes, theoretically this could continue. But the Axis would gain so much income from this exchange that the Allies would not recover, and eventually attrition will stop UK from being able to retake since they won’t be able to buy new units and Germany will.
@The-General-0 A quick US liberation of London assumes the German navy and its transports have been eliminated.Italy can throw a wrench into the allies plans as well.