Sadly, I can. We have a microlight school on the airfield as well as a Declared Training Organisation (where we train people for the PPL). There is in the UK currently no upgrade path from the microlight licence to the PPL.
In my opinion, having flown the C42 extensively, it's nearly as good at teaching the basics of flying as the Cessna 150, but at lower cost. However, they both have severe weight limitations, so my 140Kg, 2 metre tall student won't fit in either whereas he happily fits in the PA28.
Actually, there WAS a path, but it depended on you having upgraded to a NPPL-SSEA several years ago, no new microlight to PPL upgrades.
TOO