Morning Paul,
Once you have both all you need is the min(10?) hours P1. Does not matter on which type. Then do one hour per type ( so two hours) with an instructor at the renewal (or in the 12 months) before the renawal date in your case May 2014. So May 2013-14 as you say is when you need to do the hours.
Question....is the NPPL an SLMG not a TMG?
Hope this helps....
Damien