G-KEST, if you were on a salary at a club and now hold just a NPPL, presumably you are no longer able to hold a JAA Class 1 or 2 medical certificate? If you can hold a Class 2, then you could instruct without remuneration on a JAR-FCL PPL(A). But if you can hold neither Class 1 nor Class 2, perhaps the wisdom of instructing ab-initios might be open to question by some?
I too regret the passing of the BCPL/FI which only needed a UK Class 2 medical; for that you have your erstwhile fellow Belgranists to thank......