[alasdairking]

You can become a "junior soldier", which means you go to college in Harrogate until you are 18 and actually become a soldier.

https://jobs.army.mod.uk/regular-army/entry-options/soldier/

[d1sxeyes]

True, but even if you’re only in Harrogate until you’re 18, you are still signed up until you’re 22, meaning you can be killed on a battlefield aged 18 because of a decision you made when you were 16.

In the context of the discussion on voting, I think the “decision” part is the key point here.