While it is the case that one can sit the test after 35 training hours, one should remember that the experience, confidence and proficiency gained in the remaining hours can greatly increase the ability of the candidate to perform well under test pressures.
If one has reached the required standard after 35 hours, the remaining 10 hours cauld be used to;
a) Gain a night qualification; and
b) Gain further experience
so that the test can be completed in the last few hours of the 45 minimum required for the grant of a PPL.
In this case you get a PPL and night qualification at the same time. A saving overall.
DFC