But as I said, can anyone imagine us launching them without the US leading a strike? Who would we use them against, and why would we have cause for launching without the support of the yanks?
As I said we might not always be allied with the US.
LAunching them is not the point they are a deterrent. The sheer fact we have them, protects us. Imagine if North korea or a dozen other country got them and we and Europe disarmed. We would be blackmailed.
Unlikely - probably
Possible - certainly
It's not a waste of money. The contract to build and maintain them will employ thousands of people in the uk for decades. Like any project some will go to america.