OK...from memory - although LASORS will be more accurate...although this should give you an idea...
JAR licences are quite simple. If you want to fly microlights you need a microlight rating issued.
That means traning as necessary + skills tests + money to CAA (64?) for the rating.
If you then want flexwing thats 5 hours differences training (if you have a microlight rating) or 5 hours + skill test if you dont...but then to fly fixed wing microlight you need more differences training.
If you have an old UK PPL then I believe you have lost the right to fly microlights as you are now on a JAR SEP class rating - which does not cover microlights. So where as you could under the Group A rating I no longer think its possible and training/ratings will be as reqd above.
Hope this helps,