Sumps -
ukeng is wrong, someone in the armed forces can not hold a licence anymore, unless its a previously gained bcar. You can now take the modular exams for a b1 or b2 but to be granted a licence you will have to show 12 months civil aviation experience.
This is also included in the 5 years you have from passing the first module to gaining a licence.
If you have any more questions about getting a jar licence I will be happy to help. I am just coming to the end, 1 module to go.
By the way I have a jar A licence and 25 years of aircraft engineering including mod apprenticship and I am on low 20k with shift pay!