General Discussion

This is Britain's nuclear deterrent and the logic is simple:

Whatever happens to the mainland, even if it's utterly destroyed, that lone submarine will always be ready and able to strike back with overwhelming force.

(One of Britain's four Trident submarines is always out there, somewhere under the Atlantic, carrying more destructive power than was unleashed in the entire campaign of World War II.
It moves through the deep: silent, undetectable, untouchable.)

Very interesting...

That wouldn't suprise me at all, quite scary tho'