Hi,
I know you can use the hours with a TMG toward the 150 hour course start requirement.
The JAA simply state 150hrs as pilot of an aeroplane is required to begin the CPL training and apply for test. You cannot however be issued with a CPL until you have 200 hours total time, a maximum of which 30 can be from a TMG.
I’m sorry I can’t help you more with regard to SLMG or how that differs from a TMG.
Phone the CAA, they were very helpful the other day.
Regards,
Buster