Can't see conscription working in the UK now. Youth know their 'rights'.
So many different religions and nationalities that would not want to fight for the UK.
Diversity and equality - Govt would have to call up equal numbers of men and women. That would be like selecting a 50/50 male -female England Rugby team - and taking on an all-male team. Slaughtered.
Heaven help us if it ever gets to that.