In addition to the flying Syllabus a number of microlight exams must be passed and these are:

Aviation Air Law

Aviation Meteorology

Aircraft Technical

Aviation Navigation

Human Performance Limitations

GST Information

Flight Radiotelephone Operator Licence (FRTOL) - Optional for Microlights if no radio is fitted, but I for one believe it is very beneficial to take, is the FRTOL. The train course for this for me was 2.5 days followed by the exams.

Below you'll find a link that I found helpful while taking my microlight exams:

Island Microlight Club's free mock exams: Air LawMeteorology Aircraft Technical

Please note: while revising for my Aircraft technical exam I did find some incorrect answers given on the above sites.