I don't care much for the Royal family, but at the end of the day if a young lad wants to come and enjoy the TT, why shouldn't he? If he happens to be the Prince then even better, the TT needs to grab this GOOD publicity by the test tickles and make the most of it!!
He should be encouraged to return even as a guest of honour or like an earlier posting suggested to hand out the awards. Although reading between the lines I guess he'd rather turn up unannounced on his Triumph and try to kick ass on Mad Sunday like every other 21 year old biker :-)
Good luck to him :-)
Russ