I might be worth putting Jan's comment into perspective. Sur le continent the licensing arrangements for 'microlights' are very different to those in the UK.
The rigour with which we allow our rules seems well over the top. My aircraft a CH601xl is a microlight in many Europena countries - and yet mine - a lighter one weights 311kg. Obviously an aircraft like mine is going to be 'overweight' - certainly in terms of its legal category of 450 or 472kg.
Of course structurally it may well be perfectly OK - mine has a mauw of 560kg so although not legally a microlight it is perfectly safe structurally.
In the UK Section S has a maximum empty airframe weight and mandatory re-weighing so there is significantly more control.
And so are bourne many legends....