Last of the iceberg houses? Westminster approves billionaire Bertarelli’s Belgravia mega-basement

Mobile phone mogul John Caudwell has been given the green light to start digging out the basement to end all basements in Mayfair.

'Larger-than-life' subterranean complex will sprawl across nearly 7,000 square feet

The row between two of Holland Park's most famous residents over a basement dig has taken yet another twist.