My son is going to K2 pm class, and I think he will take the same school bus (or even the same class) with your twins because we live in quarrybay too. Maybe I can share his timetable with you.
9:30 to 10:00 wake up
11:00 to 12:00 lunch
12:15 school bus
1:00 to 4:00 school time
5:00 arrived home(yes, it take an hour to home because this is the last station) then tea time.
7:30 to 8:30 dinner time
9:30 bath time
10:00 storytime & sleep
beside, i think is better for you to attend parent's day because it can really help for to know more about the school.
this is a nice school & wish your twins enjoy their new school life!