As far as I know, there are two ways to do 'triple' science
Either Core, Additional, Further each as a standalone GCSE
Or Biology, Chemistry, Physics.
They are the same units but in a different pattern,
So B1, C1, P1=Core
B2, C2, P2 = Additional
B3, C3, p3 = Further
or
B1, B2, B3 = biology
C1, C2, C3 = Chem
P1, P2, P3 = physics