My favorite part of this was when one interviewee near the end was named Brian Cox, and then the interviewee after him kept repeating the word "succession." Truly forward-thinking as a docudrama/disaster movie, End Day is.
When judged as a TV movie made during the middle of the 2000s, it's fine. There are a couple of shots that understand the budget is next to nothing, and these are the most effective. Unfortunately, other shots are way too ambitious, rendering certain parts of this horrendously bad-looking.
It's interesting how Gareth Edwards more often than not makes films with bland/bad protagonists - I couldn't stand the lead guy in this, and the self-aware Groundhog Day approach to showing the world ending in several different ways is probably more interesting in theory than it was in execution here; maybe some points can be afforded for effort.