The Financial Post reports in its Friday edition that a member of the multibillionaire family behind Thomson Reuters agreed to buy a high-end London flat for 25 million pounds ($46-million). A Bloomberg dispatch to the Post says the Thomson family member -- whose exact identity is unclear -- agreed to purchase the sprawling single-level flat in Mayfair earlier this year. The deal, one of London's most expensive this year, is the latest example of how interest from wealthy individuals from across the Atlantic is proving to be a consolation for the London luxury market in the midst of a slump. The dynasty's namesake media empire traces back almost a century to the late patriarch Roy Thomson opening a radio station in Canada before it expanded into television and more than 200 print titles. Thomson Reuters' shares are up roughly 20 per cent in Toronto this year through Monday on the back of reporting strong earnings. That has helped push the Thomson dynasty's combined fortunes to about $106-billion (U.S.). Those family members include David Thomson, 68, the third Baron Thomson of Fleet, who serves as chairman of the dynasty's media empire. The Thomson family member's new purchase is a stone's throw from Grosvenor Square.