Billionaires’ basements: A new billionaires’ craze for building elaborate subterranean extensions is making swiss cheese of London’s poshest streets – but at what cost?
“The past five years have seen sprawling underground leisure lairs excavated across west London, from Knightsbridge to Belgravia, Fulham to Notting Hill. They contain playrooms and cinemas, bowling alleys and spas, wine cellars and gun rooms – and even a two-storey climbing wall.”
