That's what I'm saying and that is correct.
Linda and FFF don't agree, but if they pop me a PM, I'll forward them onto someone official to confirm!
In your case, then yes, your MEP is valid for 6 months for RATING issue. If you do CPL LST on a MEP, then as this is treated at Licence test, the CAA give it a years validity in a sense and add it to fresh CPL.