A flat in West London has sold for a record British price of more than £140m, according to a report.

The 16,000-square-foot duplex penthouse, one of four at the One Hyde Park in Knightsbridge, was sold to a buyer from Eastern Europe, thought to be either a Russian or Ukrainian, The Times newspaper said. It has been bought as an empty shell and there were estimates it could cost £20m to fit it out to the expected standard of décor and furnishings.

One Hyde Park has been described as the world’s most expensive block of flats. It was developed by CPC Group and Sheikh Hamad bin Jassim bin Jaber al-Thani, the former prime minister of Qatar.