It is softer science but there were many warnings of the problems to come with the approach including London's financial dependence, their current supppy and demand for workers being fulfilled by it and parts of the legal code left undefined by severed dependencies. Soft as the science may be it may be you just can't get a baby in a full month with any number of volunteer fertile not currently pregnant women and volunteer virile men.

Regardless of one's views of the goals or even the geopolitics there were many predictable issues that would need to be addressed before a split that weren't to make the idea look and sound good but make the transition worse.