Hydrogen-peroxide submarines as a Commonwealth conventional option

Was Britain's high-test-peroxide submarine work intended as an alternative to nuclear propulsion?

Mostly as a fast conventional option for Commonwealth navies that could not afford or support nuclear boats, not as Britain's preferred substitute for SSNs.

High-test peroxide was explored as a possible fast conventional system for Commonwealth navies that lacked the money and infrastructure to operate SSNs. Britain expected to gain nuclear submarines for itself but continued conventional development partly to support Australian, Canadian, and other aligned fleets. The experiment was dangerous and ultimately unsuccessful, yet it addressed a real alliance force-structure problem rather than simple technological eccentricity.