A missile-heavy air-defence network for Britain

What would Britain need if it relied more on surface-to-air missiles than interceptor aircraft for national air defence?

A broad radar-and-launcher network using Patriot or land-based Sea Viper technology, possibly reinforced by more Type 45 destroyers.

Surface-to-air missiles can carry more of national air defence only if Britain funds a real network rather than a paper capability. One route is Patriot; another is a land-based system derived from the Type 45 destroyer's Sea Viper architecture. Either choice needs distributed radars, launch sites, command links, and enough missiles to cover likely approaches. Type 45s operating near Britain could supplement the land network, but doing so consumes scarce naval availability.