Well there is a William Wales holding an FAA PPL(H) so you never know..
Seems as if Daifly has done his homework.
It might not be THE William Wales but - the FAA records do show the following:
Address:
ST JAMES PALACE
LONDON SW1A 1BA
Date of Issue:
5/10/2012
So I guess he is legal to fly the 500.
It's registered to a south coast based company.
If you click on the article linked in the second post of this thread it says -
The orange McDonnell Douglas helicopter carrying William and Kate belongs to Shoreham-based Eastern Atlantic Helicopters, whose managing director Simon Oliphant-Hope is a friend of the couple.
So I don't think its like a big secret who the owner dude is.
At least the Mail finally got the colour right in their article.