A limited Nuclear War, for example the equivalent to a Single Trident Missile MIRV attack (such as the missile which was recently launched over Los Angeles) on the UK would result in total destruction..

https://www.youtube.com/watch?v=9GJttnC8PoA

If you are of a nervous disposition then do not watch the 1984 film 'Threads', which seems to have been removed from Youtube.

https://www.youtube.com/watch?v=Y0VcT-XWb7M

If you are of a sentimental disposition do not watch the 1986 film 'When the wind blows'

https://www.youtube.com/watch?v=4cXO1ddrbuY

Apparently, 'the looking glass' is now constantly in the air and Gladio is back alive and kicking...