Credit Suisse has more than 1.6tn CHF (£1.3tn) in assets under management and is one of Switzerland’s largest lenders, second only to UBS. It has almost 50,000 employees, including a significant workforce in Zurich, where the bank is headquartered.

However, many of its 3,500 ‘relationship managers’, who find and serve wealthy clients, are spread across the world. The leaked accounts are linked to Credit Suisse clients living in more than 120 jurisdictions, with a concentration of clients in the developing world.

Countries with some of the largest number of clients in the data, such as Venezuela, Egypt, Ukraine and Thailand, have long struggled with political and financial elites hiding their fortunes offshore.