He's a very interesting guy, that Tom PB. I like this part a lot:
Parker Bowles is tall and fair, like his mother, though he also resembles his father, Andrew, the Queen’s former Silver Stick-in-Waiting. (Parker Bowles admitted that he isn’t sure exactly what a Silver Stick-in-Waiting does, but said it has something to do with assisting the Gold Stick-in-Waiting.) (SOURCE) 
It seems like Tom has the wise sum up for everything.