There are some aircraft that can be registered EITHER as Microlight or Aeroplane (the Jabiru comes to mind). Once registered there little chance of changing the classification. So your hours in a Jabiru UL would not count. Hours in a normal Jabiru would count (bizarre isn't it?).
I know of no Jodel, Turbulent, Luton, FRED or VP which is a microlight so each is an aeroplane and the hours all count towards licence issue (even though they are simpler and less instrumented than many modern day microlights).
Word of warning about asking the CAA FCL though. They probably will not know and you could ask 3 of them and get 3 answers. Get everything from them in writing and even then treat with a pinch of salt.