Jan 242017
 

https://www.theguardian.com/uk-news/2017/jan/22/mod-cannot-fall-back-on-usual-excuses-to-explain-trident-misfire

 

The system was tested off Florida using HMS Vengeance.

The 5,600 mile test was to be towards the west coast of Africa

The test failed with the missile self-destructing.