Is your NPPL SSEA Class Rating still valid?
In other words, assuming we're talking about 2 Feb 2008, have you flown, in addition to the 1 hr with the FI, a further 5 hours (of which 4 must have been as PIC) between 2 Feb 2007 and 2 Feb 2008?
If so, then all you have to do is to prove your Rating validity to an Examiner and obtain a new 24 month Rating validity signature in your Certificate of Revalidation. From that moment on you will start on the new system.
People often flew, quite unintentionally, with invalid NPPL SSEA Class Ratings through being victims of the infamous 'rolling validity' scheme. Which is why we were so keen to have fixed dates in licences to refer to - and came up with '12-in-24 + 6-in-12' instead.