Small correction to your post. An NPPL A (actually called an NPPL(SSEA) ) can only fly group-A and not Microlights. its a rather odd situation but if you want to fly microlights AND group A, you need two ratings (effectively 2 licenses ... 2 tests certainly).
I maintain both myself... and it is weird that my SSEA license doesn't include Microlights, but there you go
