A Grade-II listed mansion in Mayfair has been bought for £39m.
According to documents filed with the land registry it was acquired by a British Virgin Islands-registered company for £38.8m at the start of November.
Fees and stamp duty mean the total cost of the house will be closer to £45m.
The six-bedroom house has a rooftop terrace, a basement leisure suite which includes a cinema, swimming pool and steam room, and a passenger lift serving six floors.
It also has a deal with local hotels to supply concierge services, the website primeresi.com said.
The house, which was originally built in 1757, was put on the market for £50m two years ago, prior to the Brexit vote.
It has undergone a recent multi-million refurbishment which took 18 months to complete.
The sale was brokered by high-end estate agents Beauchamp Estates.
The prime central London property market has undergone a noticeable price drop in the last 12 months, underlined by a slowdown in high end residential areas such as Kensington.
A recent LonRes study showed prices across prime London dipped three per cent in the third quarter of 2018 in the wake of greater buyer uncertainty.