Here is the table comparing billionaires across Europe:
There are a lot of aristocrats in Britain, but apart from the Duke of Westminister who owns prime London property, none of them are billionaires. Instead they own country estates worth less than a hundred million, and all their spare cash goes into maintaining the property.
The British billionaires are "new money"; mainly finance and hedge fund guys - Michael Platt, Christopher Hohn, Alexander Gerko - though there are some who started companies and cashed out by selling them to the Americans. And then there are people like Denise Coates who founded and still runs the online betting company bet365. She's not just worth £9.3 billion, she's one of the highest income tax payers in Britain too as she insists on drawing a salary instead of just receiving dividends.
It's different in Germany, where 74% of billionaires have inherited their wealth. These are the descendants of the entrepreneurs whose businesses powered the wirtschaftswunder that made Germany the richest country in Europe by the 1980's. The Quandt family who own BMW shares, the Schwarz family who own Lidl, the Albrecht family who own Aldi amongst them. They're clearly becoming a new aristocracy, but without the titles.
There doesn't seem to be much new business activity creating fortunes in Germany though, which might cause problems down the line. Old businesses fail eventually and need to be replaced with new ones for economies to prosper.
Countries that frown on wealth creation eventually struggle.