Letting out their country piles as backdrops to mega-budget films and TV shows has become something of a survival tactic for many aristocrats.
People from around the world have shared snaps of the most ridiculous ones they've spotted, as collated by Cheezburger.com - including one baffling notice from a lift technician in the US.
Blake, 36, has revealed the one rule she and her husband Ryan, 47, always follow to keep the spark alive. She noted that she and Ryan never book acting gigs at the same time.
Detectives are set to hold a significant new press conference on Tuesday afternoon to confirm the discovery, but media have been told the families of the two men have been informed.