The retail tycoon, the birthday and the private members' club

Which retail tycoon is this week holding his birthday celebrations at a private club on Berkeley Square that he owns?

Well, that will be Richard Caring, according to Betaville's moles, who have informed me that Annabel's is being readied for a rather large soiree to celebrate the billionaire's birthday.

I wonder, though, whether another high-profile retail tycoon and business partner will be attending the bash?..