As Muffin said, there ain't no such licence as an NPPL(H) so 35 hours is irrelevant. The minimum for a UK private licence would be 45 hours.
I believe that very very few pass their skills test in that time and that 60 to 70 is a lot more realistic (some take longer).
I can't speak for fixed wing though.
Cheers
Whirlygig