Bo-Bo - Two Bogies of Two Powered Wheelsets (Eg would be a Class 87)
Co-Co - Two Bogies of Three Powered Wheelsets (Eg would be a Class 66)
A1A-A1A - Two Bogies of 1 unpowered wheelset, 1 powered wheelset, 1 unpowered wheelset (Eg would be a Class 31)
1-Co-Co-1 - Two Bogies of 1 Unpowered Wheelset, three powered wheelsets (Eg would be a Class 45)
Co-Bo - One Bogie of 3 Powered Wheelsets, One Bogie of 2 Powered Wheelsets (Eg would be a Class thingy cause I forgot it)
Bo-Bo-Bo - Three Bogies of 2 powered wheelsets (Eg Would be a Le Shuttle Loco)
1-Do-1 - Two Guiding Wheelsets at either end with 4 Powered Wheelsets in the centre that are not on bogies (Eg would be a Swiss Loco, there was an English train with this though, forgot it)
My Question;
What is the surviving member of the 'Director' Class called, and what Railway Company was it built for?