The Light Sport Flying School teaches on microlights, so it is unlikely that instructors will have the qualifications for the dual hours to count towards the PPL. However, an NPPL M licence can be upgraded to an NPPL SSEA quite easily once you have flown the necessary hours solo and xc. In turn, the NPPL SSEA can be upgraded to a JAR PPL quite easily, as described in LASORS C6.2.
Check out the the NPPL allowances here
http://www.nationalprivatepilotslice...20REV%2009.pdf