If this was his first solo as reported then clearly he was not ready to be sent solo. After all he did not even get around the circuit let alone attempt a landing. I also have concerns that he attempted it in a C172 and not something a bit lighter such as a C150 given he came from RAaus . Sixteen is very young to be rushed through to GA. I think the flying school snd the instructor who cleared him will have a bit of explaining to do and rightfully so. Unfortunately for them but our thoughts should be with the family who put their trust in that school.