Could Britain have built its own submarine-launched missile?

Could Britain have designed its own submarine-launched ballistic missile in the 1960s instead of adopting Polaris and later Trident?

Probably, given enough money, time, and effort, but there is no confident claim that it would have been better than the American system.

Britain probably could have developed an independent submarine-launched ballistic missile if it had committed enough money, time, and industrial effort. France provides the comparison because its industrial starting point is treated as broadly comparable. Britain instead chose an American system. Blue Streak and related studies enter the exchange, but the precise project names and relationships are not confidently recalled. Technical feasibility therefore remains distinct from whether the resulting British weapon would have been better.