MJ
"If doing a modular course you don't need a valid sep OR mep to do any of the training becuase its all dual."
WRONG!
In order to start a modular CPL course you WILL need a valid PPL with at least one valid aircraft rating SEP or MEP and a night qualification. You will also need to have passed the CPL written exams.
APP 1 TO JAR-FCL1.160.