NPPL A
My conversion took 5 hours - took it in Cessna 152
GST & NST
Most of this time was taken up with aircraft familiarisation
Now have NPPL A ( Areoplanes ) SSEA Simple Single Engine Aeroplane
No other exams - all of my fixed wing microlight flying was taken into account - you have to have certain hours but they are not much
Good luck - find out what all the fuss is about - basically its exactly the same but much more expensive and the machines much less responsive - additionally and perhaps critically you have to keep pulling this thing out that lowers engine power and stiops it icing up otherwise it stops - great fun !!