I don't agree that the book needs changing, you are still missing the point I was trying to make.
You said that a solo student pilot should NOT call under the guise of a training fix because it is dishonest / not allowed. It's not really dishonest and it IS a legitimate use of the Emergency frequency, in accordance with national procedures.
But it is fine for a student to make the same call as long as he makes it a "PAN" call and he is more lost than he was before?
This takes up MORE air time on 121.5 and by perhaps leaving the call for a position fix until he was REALLY lost, he may cause mayhem, especially if an airspace bust has taken place in the vicinity of arrivals or departures (ask Luton Radar). I can't follow the logic of the argument.
Perhaps a separate emergency channel for solo student pilots might be the answer. Perhaps your airline might like to fund it, or cease trading on a Saturday?