We have 150k people in armed forces
And 50k in reserves.
11000 currently deployed.
(Just looked it up).
Bil is in reserves. They are trained and ready to be called up.
The nature of war now esp with us on an Island it feels unlikely we will need loads of people to go out and physically engage.
Unless something happens massive. Huge civil war would be one and Europe/ Scandinavia etc suddenly deciding to get expansionist.
Anything from Russia NK USA China would be long distance. And they all have nukes. As do we. 1980s war games (great film!) again.
Wars these days are very very different though, just not at all the same.
Hopefully the fact that dropping nukes renders areas radioactive for ages and so not much use is a deterrent now.
When the USA dropped nuclear bombs on Hiroshima and Nagasaki the extent of the long term consequences was not known/ tested/ considered.
Maybe contraversial but imo they were atrocities. Nukes are just off the scale appalling atrocity