I was in a similar position to yourself, training on the C42 as well - luckily I was able to get my NPPL (SSEA) in time.
Currently I have a LAPL(A) but am going through the PPL(A) conversion which involves doing the 9 ground exams, 10 hours training at an ATO (4 of which are solo) and a skills test.
To my knowledge you can count up to 10% of your microlight time to a maximum of 10 hours towards the PPL application.
How many hours are you into your training? You can fly microlights with a LAPL - maybe doing the LAPL would be a better license for you? Then you have the option to fly either Microlights or light aircraft but don't need quite as much training. Although just because the minimum hour requirements are lower for the LAPL, it doesn't mean you will only need that amount of training - the average for a PPL is something like 60 hours.