Come on Guys sort it out.
SEP Reval can be done by either
Experience OR Test
If you are doing it by Experiance you do your 12 hours in the second year of validity (at least 6 P1, 12 to's and Landings and 1 hr with inst etc) and WHILST the rating is still valid and WITHIN the 3 months prior to expiry you present this to an Examiner and he will give you 24 months FROM THE EXPIRY.
In this case he will sign the C of R page and should also complete the LPC-SPA form, tick the Reval by Experiance box and send it to the CAA. No fee required and the CAA keep this.
If you are doing it by test you either do a Prof check (if the rating is still valid) or a Skills test (if it's expired) in both cases the Examiner signs the licence (If its a Prof Check within the last 3 months of validity he gives you 24 months from the expiry date, if it's before the 3 months it's 24 months from the date of the prof check)
In both cases the Examiner should complete a form and send it to the CAA.
EITHER the LPC-SPA for a Prof Check or the LST-SPA for a Skills test and in all cases send it to the CAA.
If the rating expired more than 5 years ago then you still do the Skills test but the Examiner doesn't sign the Licence. You send the form to the CAA with £64.
Also if it's 5 years + you complete an Oral test as part of the LST to cover the changes in regulations.
I hope this is now clear....ish
Lots of Love
Wibbly P