Tailwheel issue also resolved as was. NPPL legally requires differences training & logbook signoff. JAA PPL does not, it's a SEP, the pilot should be intelligent enough to find out where the wheels are
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Er no! Either NPPL or JAA PPL requires differences sign off for all of the 7 required differences training.
Tailwheel
SLPC
EFIS
Retract
Wobbly Prop
Turbo Charging
Pressurisation
Therefore unless your Instructor had differences training in his logbook or could claim currency and grandfather rights then he could not be PIC.