The tycoon, who has an estimated net worth of £13.3billion, bought French club Nice for £91m in 2019 two years after purchasing Swiss team FC Lausanne-Sport.
Lord Lucan has been wanted for the murder of his children s nanny since 1974. It is known he drove close to Newhaven harbour before he disappeared without a trace.
Follow Sportsmail s live blog for all the latest news on Manchester United s potential takeover, after Sir Jim Ratcliffe announced his interest in buying the club.