Why naval Bloodhound lost to Sea Dart

Why was a navalized Bloodhound rejected in favor of Sea Dart?

Bloodhound was too large and specialized for strategic-bomber interception; Sea Dart was a more practical purpose-built naval missile.

Bloodhound was a large land-based missile intended primarily to intercept strategic bombers. Its Mark 2 version is described as about 8.45 meters long, approaching Talos in scale, while the Mark 3 or R.O. 166 proposal included a 6-kiloton nuclear warhead that was never fielded. High speed and long range did not give the early versions the agility needed for every naval target. Bloodhound also had to be handled as a complete missile, unlike Talos's arrangement for assembling separate sections aboard ship. The comparison with American Talos cruisers illustrates the installation burden imposed by weapons of this size. Sea Dart is judged a better fit for the Royal Navy's available ships, budget, and air-defense requirement.