Over the years I have flown a number of small light aircraft that weigh around 300kg or less. Types such as Turbulent, Nipper and Minor. All of these being classed as "group A" in the past. It sort of amused me when I had to be checked out in a 450kg Eurostar as it was a Microlight and needed differences training. Turned out it was no more than a nice 3 axis machine with good handling and visibility but with a certification more suited to flexwings.
The Eurofox situation sums up the current nonsense - two identical versions with differing weight limits and licences - reckon the microlight version gets flown overweight sometimes
I'm in favour of rationalising this sector....