Robert,
Do you have an NPPL(A)?
I recently went from NPPL(M) -> NPPL(SSEA) -> LAPL(A) and am now working to PPL(A).
Assuming you have an NPPL(A) I think you just need to do 10 hours PIC and then you can apply for your LAPL(A) under "grandfather rights" - it's a quick paperwork excersize.
Hope that is helpful.
Gordo