FCL305.CPL
(b) Conditions. An applicant for the issue of a CPL shall have fulfilled the requirements for the class or type rating of the aircraft used in the skill test.
2. Before commencing a CPL(A) modular course an applicant shall be the holder of a PPL(A) issued in accordance with Annex 1 to the Chicago Convention.
3. Before commencing the flight training the applicant shall:
(a) have completed 150 hours flight time;
(b) have complied with the prerequisites for the issue of a class or type rating for multi-engine aeroplanes in accordance with Subpart H, if a multi-engine aeroplane is to be used on the skill test.
You could do the CPL on a Single with VP prop and Retractable gear then add the ME or do the ME Course and then take the CPL test in the ME.
You cannot count the ME Class rating as part of the CPL Training. This was allowed by the UK before EASA.