Britain's "independent" nuclear missiles...

[Robert]

... don't know which direction they're supposed to be going in:

the Trident II D5 missile was intended to be fired 5,600 miles (9,012 km) to a sea target off the west coast of Africa but veered towards the US.

The cause remains top secret, the paper adds, but quotes a senior naval source as saying the missile suffered an in-flight malfunction after launching out of the water.

HMS Vengeance, one of the UK's four Vanguard-class submarines, returned to sea for trials in December 2015 after a £350m refit, which included the installation of new missile launch equipment and upgraded computer systems.

 

[Robert]

Theresa May knew about Trident failure before renewal vote

 

[Robert]

 

[Robert]

UK's Trident nuclear submarines 'vulnerable to catastrophic hack'

 

[FluffyMcDeath]

UK's Trident nuclear submarines 'vulnerable to catastrophic hack'

Oh deary deary me. Looks like we'll have to give our weapons systems the ability to defend themselves. That will make it all OK.

 

[Robert]

Oh deary deary me. Looks like we'll have to give our weapons systems the ability to defend themselves. That will make it all OK.

Given the "targeting issues" perhaps they've already been compromised.
That's assuming the UK ever really had full control of them.