CPL - The CPL is valid for 5 years and is renewed by sending off a valid class or type rating to the CAA.
MEP - The MEP rating is valid for 12 months and is renewed with a flight test with a registered examiner.
IR - The IR is valid for 12 months and is renewed with a flight test with a registered examiner. If you renewed your licence in the simulator one year you will need to renew in the aircraft the next year and visa versa.
Not sure of the others, if anyone can enlighten us, that would be great!
Thanks,
MB