first, got a few question need to ask u.
U meant working in SPF during NS or regular??
If working as regular, u meant working as those who are patrolling
or Non Shift hours staff??
NS guy would have their 3 months training inside HTA then posted
out, then need to depend on where their posting, some would be 8am
to 5pm, some would follow those on shift work.
for regulars, u would have 6 months training inside HTA, then
posted out, most likely, u be posted for shift work. For your
information, on theroy, it state that u would work 12 hours when on
shift, but in reality, u work about 16 hours per shift.
So hope i had answer your question.