"Yes your right. The 12 hours must be in the last 12 months of the two years. This must include 1 hour with an instructor (P/UT) and i think a minimum of 6 take off and landings."
NO - The requirement for maintaining SEP Class Rating validity is for 12 hours total in the second 12 month period, of which 6 must be as PIC and 1 must be a training flight with a FI or CRI(SPA). It includes a requirement for
12 take-offs and landings.
"You then must get that signed up within the expiry time."
Before the end of the Rating validity period.
"If not signed or you do not do the 12 hours. You can renew the SEP class rating by a skills test with an examiner . If you let it lapse for more than 5 years its a full PPL skill test."
NO. If you do not get the Certificate of Revalidation signed within the validity period, you will be required to renew the Rating by flying a SEP Class Rating renewal LST. As an alternative to acheiving the mandatory 12 hours, you may
revalidate your SEP Class Rating by flying a SEP Class Rating revalidation LPC within the last 3 months of the Rating validity period.
Your
licence not Rating, must be re-issued after 5 years. To do so, you need to hold a valid Class (or Type) Rating and medical, complete a form and send it (plus re-issue fee) to the CAA.
If you let your Rating lapse by more than 5 years, you will need to pass a SEP Class Rating renewal LST and pass an oral exam with the Examiner, then send your paperwork off to the CAA...with the relevant fee. You do NOT need to fly the full PPL Skill Test!
Finally, you need to maintain 90 day recency in order to carry passengers.
"I am pretty sure the above is accurate but look in LASORS or the CAA website."
Not really. So why not download LASORS
free of charge from
http://www.caa.co.uk/docs/33/LASORS_07.pdf .