fourth para

Posted by Noga on January 15, 2005

I'm lost, please help me! I'm translating a British police-under-cover series (called "In Deep", maybe you know it?). Anyways, I'm having problems with a specific sentence (it's someone's police profile):
"...convictions for riot and affray, three years in fourth para, active service in Northern Ireland and the Gulf..." - what the hell is "fourth para"???? I couldn't find it anywhere. Does anyone here know? is it a prison or something? Please help...