Trim Stab,
Why? Award of a CPL is not just a test of a pilot's ability to control an aircraft, it also requires that a pilot has learnt, understands, and has passed an exam on civilian regulations. As these are not taught in the military syllabus, why should award of "wings" also include award of a CPL? The two qualifications are different.
I think you’ll find that military pilots, who routinely operate in controlled airspace and at civilian airports across the world, are every bit as cognisant with civilian regulations as their civilian counterparts!
However, just as the Secretary of State for Transport (through the CAA) has to demonstrate to EASA that UK's civilian pilots conform to certain standards, I would suggest that the Secretary of State for Defence (through the MAA) should do the same for the UK's military pilots.
Once that principle is accepted, then proper accreditation will be easy.
If the MAA or MOD doesn’t do so, then what are EASA to think?