Hidden beneath Belgravia’s streets is a rare and unexpected sight: a cavernous, pristine green and white space that houses London’s, and quite possibly the UK’s, only subterranean tennis court.
Part of an 18,500 sq ft leisure space called The Garrison Club at Chelsea Barracks – where one-bedroom apartments in the latest phase, 9 Mulberry Square, start at £3.4m, and you can spend £55m on a turnkey townhouse – this court is usually available only to residents and their guests. But on one early summer’s day, I am invited to be among the first to test out this unusual and glorious court. Fluffy clouds and soaring birds are being projected on the 13-metre-high ceiling (plenty of space for even the most wayward of lobs), so it couldn’t feel less underground. The glass-like surface – one of just four ASB GlassFloors to be installed in the UK, its glass, ceramic and aluminium combination is designed to last 60 years – is fast and, despite appearances, not remotely slippery. And the LED-illuminated lines can, at the press of a button, switch to accommodate other sports including basketball or five-a-side football.