ukdefencejournal.org.uk
Who controls Trident?
One of the most common myths around the system is that the United States has control over the UK’s Trident missile system, that is not the case.
The UK does rely on the US for the heavy maintenance and long term support of the system. For example, the British missiles are serviced at a port in the Georgia, US, and some warhead components are also made in America.
This is why the use of the word ‘operational’ is significant, while the UK can fire without permission, the system would likely not be sustainable without US support beyond a few years.