As EGBK mentioned, it depends what / where your flying will progress to ?
If like me, you have no aspirations to fly at night, or instrument, then the NPPL seems without a doubt the best way forward, as the costing is about half that of PPL, and lets face it, the better fixed wing microlights are every bit as good if not better, than most ageing school group A machines, + again about half as much to rent