Currently, if you have an NPPL(Microlight), you can then add the NPPL(SSEA) Class Rating.
Then you can convert the NPPL(SSEA) to a LAPL(A) - you have until Apr 2015 to do this unless you want to be restricted to non-EASA aircraft thereafter. The LAPL(A) includes privileges to fly aircraft with 4 PoB (including the pilot) and with a max take-off weight of up to 2000 kg throughout the EU.
Once you have your LAPL(A), you can convert it to a part-FCL PPL(A).
You may fly Microlight aircraft within the privileges of a LAPL(A) with SEP privileges or a PPL with SEP Class Rating - you need to complete differences training if not previously Microlight qualified.
Both Europe Air Sports and IAOPA Europe have proposed that flight time in Microlights may be used towards rating revalidation / LAPL recency. But we won't know EASA's response until the end of 2013 at the earliest....
