The Bishops Avenue, known as Billionaires' Row, in London has become a street of empty and neglected mansions, despite its reputation as one of the most expensive streets in the world. Many of the properties are owned by shell corporations registered in foreign tax havens, making it difficult to determine the true owners. The estimated value of foreign-owned houses in London is £55.2 billion, with over £2 billion belonging to Russian oligarchs subject to sanctions. Meanwhile, Londoners struggle to find affordable housing in the city.