Having been packed off to Sandringham to learn how to keep his mouth shut and his boots polished, the wayward Prince Harry is undergoing a makeover, and now he even has what every difficult teenager needs: a mentor who understands the difficulty of behaving with dignity while in the public eye.

Roll on the wellknown etiquette expert Russell Crowe, who has appointed himself unofficial advisor to Harry.

His first act in this role was to defend Harry's Nazi uniform faux-pas ("He should be able to dress up in any way he likes") and no doubt his gems of wisdom on all social situations, from bar-room brawls to how to handle the ladies, will soon be forthcoming.

The Palace must be delighted