It's not surprising. If you can find yourself in court decades later for doing as you're told, it's hardly surprising there's a shortage of volunteers.In April this year the number of Army personnel fell yet again and are 4,000 short of the MOD target.
They are also missing the targets for recruiting into the AR
All the facts and figures are in the links below.
From Here: British Army Troop Numbers Fall 4,000 Under Target
From Here; Number of soldiers in British Army falls - BBC News
The latest releases from the MOD can be found here;
UK armed forces monthly service personnel statistics: 2017 - GOV.UK